fix: 🐛 Update AST search logic to resolve duplicate errors (#8)

* Modified `Measure-BasicWebRequestProperty` and
`Measure-InvokeWebRequestWithoutBasic` to fix duplicate errors caused by
recursive AST searches.
* Updated `CHANGELOG.md` for version 0.3.1 to reflect these fixes.
* Added tests to ensure proper detection of method usage with
`Invoke-WebRequest`.

Fixes #7

release: [0.3.0] 2025-12-13 (#6)

### Added

- `Measure-BasicWebRequestProperty`: Detects when `Invoke-WebRequest`
uses `UseBasicParsing` with incompatible properties like `Forms`,
`ParsedHtml`, `Scripts`, or `AllElements`. Works with both direct
property access and variable assignments.
- `Measure-InvokeWebRequestWithoutBasic`: Flags `Invoke-WebRequest` (and
its aliases `iwr`, `curl`) when used without the `UseBasicParsing`
parameter.
- `Get-CommandParameter`: New private helper function to parse command
parameters from AST, including support for positional parameters.
- Documentation for new rules in `docs/en-US/` directory.
- Comprehensive test coverage for new rules.

### Changed

- Updated `about_GoodEnoughRules.help.md` with complete module
documentation including examples, rule descriptions, and troubleshooting
guidance.
- `Measure-SecureStringWithKey`: Standardized parameter block formatting
and updated to use `Get-CommandParameter` helper function.
- Test files: Added BeforeAll checks to ensure module builds before
testing.
- Improved code consistency across all rule files (param block
formatting, using consistent helper function names).