Correct analyzer count and remove StyleCop from CONTRIBUTING.md

[Copilot]

Description

CONTRIBUTING.md claimed the project uses 8 analyzers and listed StyleCop.Analyzers, but Directory.Build.props only configures 7 analyzers and doesn't include StyleCop.

Changes:

• Updated analyzer count from 8 to 7 in two locations
• Removed StyleCop.Analyzers entry from the analyzer list
• Renumbered remaining analyzers 1-7

The documentation now accurately reflects the actual configuration in Directory.Build.props.

Type of change

• Documentation update

How Has This Been Tested?

• Verified CONTRIBUTING.md changes match Directory.Build.props configuration
• Confirmed all 7 listed analyzers are present in Directory.Build.props

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

Screenshots (if applicable)

N/A - Documentation-only change

Additional context

This PR addresses review feedback on #8 to ensure documentation accuracy.

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[Copilot]

Pull request overview

This PR corrects a documentation error in CONTRIBUTING.md where it incorrectly claimed the project uses 8 analyzers and listed StyleCop.Analyzers. The actual configuration in Directory.Build.props contains only 7 analyzers, without StyleCop.

Changes:

• Updated analyzer count from 8 to 7 in two locations within CONTRIBUTING.md
• Removed the StyleCop.Analyzers entry from the analyzer list
• Renumbered the remaining analyzers from 1-7 to maintain sequential ordering