Add LSG diagnostic articles

[gewarren]

Contributes to #48865

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Internal previews

📄 File	🔗 Preview link
docs/fundamentals/syslib-diagnostics/source-generator-overview.md	Source-generator diagnostics in .NET 6+
docs/fundamentals/syslib-diagnostics/syslib1024.md	SYSLIB1024 error
docs/fundamentals/syslib-diagnostics/syslib1025.md	SYSLIB1025: Multiple logging methods should not use the same event name within a class
docs/fundamentals/syslib-diagnostics/syslib1026.md	docs/fundamentals/syslib-diagnostics/syslib1026
docs/fundamentals/syslib-diagnostics/syslib1027.md	SYSLIB1027: Primary constructor parameter of type 'Microsoft.Extensions.Logging.ILogger' is hidden by a field
docs/fundamentals/syslib-diagnostics/syslib1220-1229.md	SYSLIB diagnostics for System.Text.Json source generation
docs/navigate/tools-diagnostics/toc.yml	docs/navigate/tools-diagnostics/toc

[Copilot]

Pull Request Overview

This PR adds documentation for four new SYSLIB diagnostics (1024-1027) related to the logging source generator and updates the description for SYSLIB1225.

• Adds documentation pages for SYSLIB1024, SYSLIB1025, SYSLIB1026, and SYSLIB1027
• Updates TOC and overview index to include the new diagnostics
• Changes SYSLIB1225 description from "Reserved" to actual diagnostic description

Reviewed Changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
toc.yml	Adds navigation entries for the four new SYSLIB diagnostic pages
source-generator-overview.md	Converts plain text entries to hyperlinks and adds link references for SYSLIB1024-1027
syslib1220-1229.md	Updates SYSLIB1225 description from reserved to actual diagnostic and updates date
syslib1024.md	New documentation for "out parameter modifier not supported" error
syslib1025.md	New documentation for "duplicate event names" error
syslib1026.md	New documentation for "C# version not supported" error
syslib1027.md	New documentation for "primary constructor parameter hidden by field" error