Clarify precedence groups.

[BillWagner]

Fixes #50888

Readers had misinterpreted the list of operator precedence as an absolute list, rather than a list of groups.

Clarify that within the same group, operators are evaluated in lexical order. Clarify that each list is a group with the same precedence.

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Internal previews

📄 File	🔗 Preview link
docs/csharp/language-reference/operators/arithmetic-operators.md	Arithmetic operators (C# reference)
docs/csharp/language-reference/operators/bitwise-and-shift-operators.md	Bitwise and shift operators (C# reference)
docs/csharp/language-reference/operators/boolean-logical-operators.md	"Boolean logical operators - the boolean and, or, not, and xor operators"
docs/csharp/language-reference/operators/index.md	C# operators and expressions
docs/csharp/language-reference/operators/pointer-related-operators.md	Pointer related operators - take the address of variables, dereference storage locations, and access memory locations

[Copilot]

Pull request overview

This PR clarifies operator precedence documentation in response to issue #50888, where readers misinterpreted flat lists as implying different precedence for each operator. The changes restructure precedence information to explicitly show groupings and add a statement about evaluation order for operators with the same precedence.

Changes:

• Added clarification in index.md that operators with the same precedence are evaluated in lexical order
• Restructured precedence lists in five operator documentation files to explicitly show precedence groups with links to the main precedence table
• Changed list introductions from "orders operators from highest to lowest" to "orders operators in groups from highest to lowest"

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 11 comments.

Show a summary per file

File	Description
docs/csharp/language-reference/operators/index.md	Added statement about lexical order evaluation for same-precedence operators
docs/csharp/language-reference/operators/boolean-logical-operators.md	Restructured logical operator precedence list into linked groups
docs/csharp/language-reference/operators/bitwise-and-shift-operators.md	Restructured bitwise operator precedence list into linked groups
docs/csharp/language-reference/operators/arithmetic-operators.md	Restructured arithmetic operator precedence list into linked groups
docs/csharp/language-reference/operators/pointer-related-operators.md	Restructured pointer operator precedence list into linked groups