Enhance repo hygiene analysis: rename button, add docs links, and Ask Copilot to Improve

[Copilot]

The repo hygiene analysis panel lacked context on why checks matter and had no quick path to act on findings.

Changes

Button rename

• "Analyse Repository" → "Analyze Repo for Best Practices" to clarify intent upfront

Per-check documentation links

Each check row now renders a 📖 View documentation link pointing to the relevant official resource:

Check ID	Docs
git-repo, gitignore, env-example, commit-messages, ci-config, devcontainer, dockerfile, license	docs.github.com
conventional-commits	conventionalcommits.org
type-safety	typescriptlang.org
editorconfig	editorconfig.org
scripts	npmjs.com (package.json scripts)
task-runner	GNU Make manual
version-pinning	nvm .nvmrc docs

"Ask Copilot to Improve" button

When failed/warning checks are present, a 🤖 Ask Copilot to Improve button appears after the recommendations section. It synthesizes all failing checks into a structured prompt and opens Copilot Chat pre-filled (not auto-submitted):

// webview → extension
vscode.postMessage({ command: 'openCopilotChatWithPrompt', prompt });

// extension.ts — new handler
case 'openCopilotChatWithPrompt':
    await vscode.commands.executeCommand('workbench.action.chat.open', message.prompt);
    break;

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💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.