Revise README for improved documentation

[EricCogen]

Updated README.md to enhance clarity and detail about GauntletCI's functionality and comparison with other tools.

[Copilot]

Pull request overview

Updates README.md to add a clearer positioning section that contrasts GauntletCI with tests, linters, static analysis, AI review tools, coverage tools, and profilers.

Changes:

• Added a comparison table explaining what other tool categories do vs. what they miss, and GauntletCI’s niche.
• Added a “One‑Line Summary” table to distill the comparison into quick takeaways.
• Added a brief “Where GauntletCI Sits” positioning section and a restated core question.

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[Copilot]

This section introduces several non-ASCII punctuation characters (smart quotes “”, curly apostrophe ’, en dash – / non-breaking hyphen ‑). These can be hard to search/grep and sometimes render inconsistently in terminals or some markdown pipelines. Consider replacing them with plain ASCII equivalents (" ", ', -, etc.) for consistency and portability.

Suggested change

	| Tool Type | What It Does | What It Misses | GauntletCI’s Advantage |
	|-----------|--------------|----------------|-------------------------|
	| **Unit / Integration Tests** | Verifies expected outcomes for specific scenarios | Behavior changes outside tested paths; untested edge cases | Flags when behavior changed but no new test covers that change |
	| **Linters (ESLint, RuboCop, etc.)** | Enforces style, syntax, and basic code quality | Behavioral risk; semantic changes; logic flow | Catches *what* changed, not just *how it looks* |
	| **Static Analysis (SonarQube, Roslyn)** | Finds code smells, potential bugs in the whole codebase | Diff‑specific behavioral changes; assumes current code is the baseline | Analyzes the *difference* – what’s new or removed |
	| **AI Code Review (Copilot, Cursor, etc.)** | Suggests improvements, explains code, finds obvious bugs | Often misses validation gaps; focuses on style or known patterns | Specifically looks for behavior changes without proof of validation |
	| **Test Coverage (Coverlet, JaCoCo)** | Measures which lines are executed by tests | 100% coverage doesn’t mean behavior is correct; doesn’t analyze *changes* | Points to changed lines that lack any test covering them |
	| **Performance Profilers** | Measures speed, memory, resource usage | Requires runtime data; doesn’t run pre‑commit | Works from diff alone – no execution needed |
	| **GauntletCI** | **Evaluates the diff to find unvalidated behavioral changes** | Does not prove correctness; may have false positives | Fills the gap *between* “tests pass” and “behavior is still correct” |
	### One‑Line Summary
	| Tool | The Gap It Leaves |
	|------|-------------------|
	| Tests | “You only test what you think to test.” |
	| Linters | “You can follow style and still break behavior.” |
	| Static Analysis | “The code is clean, but the change is risky.” |
	| AI Review | “Suggests improvements, but doesn’t ask if you validated the change.” |
	| Tool Type | What It Does | What It Misses | GauntletCI's Advantage |
	|-----------|--------------|----------------|-------------------------|
	| **Unit / Integration Tests** | Verifies expected outcomes for specific scenarios | Behavior changes outside tested paths; untested edge cases | Flags when behavior changed but no new test covers that change |
	| **Linters (ESLint, RuboCop, etc.)** | Enforces style, syntax, and basic code quality | Behavioral risk; semantic changes; logic flow | Catches *what* changed, not just *how it looks* |
	| **Static Analysis (SonarQube, Roslyn)** | Finds code smells, potential bugs in the whole codebase | Diff-specific behavioral changes; assumes current code is the baseline | Analyzes the *difference* - what's new or removed |
	| **AI Code Review (Copilot, Cursor, etc.)** | Suggests improvements, explains code, finds obvious bugs | Often misses validation gaps; focuses on style or known patterns | Specifically looks for behavior changes without proof of validation |
	| **Test Coverage (Coverlet, JaCoCo)** | Measures which lines are executed by tests | 100% coverage doesn't mean behavior is correct; doesn't analyze *changes* | Points to changed lines that lack any test covering them |
	| **Performance Profilers** | Measures speed, memory, resource usage | Requires runtime data; doesn't run pre-commit | Works from diff alone - no execution needed |
	| **GauntletCI** | **Evaluates the diff to find unvalidated behavioral changes** | Does not prove correctness; may have false positives | Fills the gap *between* "tests pass" and "behavior is still correct" |
	### One-Line Summary
	| Tool | The Gap It Leaves |
	|------|-------------------|
	| Tests | "You only test what you think to test." |
	| Linters | "You can follow style and still break behavior." |
	| Static Analysis | "The code is clean, but the change is risky." |
	| AI Review | "Suggests improvements, but doesn't ask if you validated the change." |

[Copilot]

There are two trailing spaces after the colon here, which forces a hard line break in Markdown. If the hard break isn’t intentional, remove the trailing spaces; if it is, consider using an explicit <br/> to make the intent clearer.

Suggested change

	GauntletCI answers a question no other tool asks:
	GauntletCI answers a question no other tool asks:<br/>

[Copilot]

These list items use multiple spaces to try to visually align the left/right sides (e.g., around the arrows). Markdown collapses consecutive spaces in normal text, so the alignment won’t be reliable across renderers. Consider using a small table or a code block if alignment is important.

Suggested change

	- **Correctness (Tests)** ← → **Behavioral Risk (GauntletCI)**
	- **Quality (Linters/SAST)** ← → **Validation Gaps (GauntletCI)**
	- **What the code IS** ← → **What CHANGED (GauntletCI)**
	| Left | | Right |
	|------|-|-------|
	| **Correctness (Tests)** | ← → | **Behavioral Risk (GauntletCI)** |
	| **Quality (Linters/SAST)** | ← → | **Validation Gaps (GauntletCI)** |
	| **What the code IS** | ← → | **What CHANGED (GauntletCI)** |