[wasm] Make finding information for wasm in docs/ easier

[Copilot]

Summary

This PR reorganizes and streamlines the WebAssembly (Wasm) documentation in the docs/ directory. It consolidates duplicate debugging instructions, introduces a top-level Wasm documentation hub, and improves cross-references between related topics. The documentation is now easier to navigate and is focused on contributor workflows.

Key changes:

• Created wasm-documentation.md as the main entry point for Wasm topics (build, debug, test, benchmark, Codespaces, etc.).
• Consolidated all Wasm debugging guides into a single reference.
• Merged library testing and debugging content.
• Added FAQ for common Wasm scenarios.
• Updated links and removed duplicated content.
• Improved documentation structure and logical flow.
• Ensured all content is contributor-focused and maintains previous information.
• Fixed style: Changed WASM to Wasm throughout, removed redundant 'comprehensive' wording, and simplified descriptions.

These improvements make it significantly easier for contributors to find relevant Wasm documentation and follow consistent workflows.

Fixes #81798

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[Copilot]

Pull Request Overview

This PR addresses the issue of scattered WebAssembly documentation by creating a comprehensive documentation organization system for WASM-related content in the dotnet/runtime repository. The purpose is to make it easier for developers to find information about building, testing, debugging, and working with WebAssembly in the .NET runtime.

Key changes:

• Created a centralized WebAssembly documentation index with comprehensive cross-references
• Consolidated debugging instructions into a single reference document
• Added cross-references from existing WASM documentation to the new centralized resources

Reviewed Changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
docs/README.md	Added link to new WebAssembly documentation index
docs/workflow/wasm-documentation.md	New comprehensive WASM documentation hub with FAQ and cross-references
docs/workflow/debugging/wasm-debugging.md	New consolidated debugging reference with VS Code and Chrome DevTools instructions
docs/workflow/debugging/mono/native-wasm-debugging.md	Updated to reference consolidated debugging guide
docs/workflow/debugging/libraries/debugging-vscode.md	Updated cross-references to new debugging documentation
docs/workflow/testing/libraries/debugging-wasm.md	Replaced duplicated content with references to consolidated debugging guide
src/mono/wasi/README.md	Removed duplicated debugging instructions, added reference to consolidated guide
src/mono/browser/README.md	Added reference to comprehensive WASM documentation
src/mono/wasm/features.md	Added reference to comprehensive WASM documentation
src/mono/wasm/threads.md	Added reference to comprehensive WASM documentation

[ilonatommy]

@copilot, fix

Error: docs/workflow/debugging/wasm-debugging.md:40:69 MD009/no-trailing-spaces Trailing spaces [Expected: 0; Actual: 2]
Error: docs/workflow/debugging/wasm-debugging.md:65:65 MD009/no-trailing-spaces Trailing spaces [Expected: 0; Actual: 2]
Error: docs/workflow/debugging/wasm-debugging.md:171:76 MD009/no-trailing-spaces Trailing spaces [Expected: 0; Actual: 2]
Error: docs/workflow/wasm-documentation.md:66:53 MD009/no-trailing-spaces Trailing spaces [Expected: 0; Actual: 2]

[ilonatommy]

@copilot, your last session failed. Retry

[ilonatommy]

The CI has probably the same problem as aspnetcore did: dotnet/aspnetcore#62509. Build Analysis expects any job that is green but does not find them and waits for ever. I will add a similar ever-green job for docs-only changes.

[jkotas]

The structure looks fine to me. I do not work day-to-day on wasm, so I cannot vouch for factual correctness of the updates.

@pavelsavara @radekdoulik @AaronRobinsonMSFT Could you please review and signoff?