webview: Configure Template Gallery AI and workspace options

[Tsuyoshi Ushio (TsuyoshiUshio)]

Summary

Makes the shared Template Gallery production-configurable for consuming extensions.

• Adds TemplateGalleryConfig.aiGeneration for AI tab labels, descriptions, example prompts, confirmation copy, and capability bullets
• Adds extension-defined workspace checkbox options shared across template creation and Copilot Chat flows
• Passes workspace option values to createProject and continueInChat, and includes the selected project location in the chat handoff
• Preserves the existing createProject(..., entryPoint?) argument order and appends workspace options for backward compatibility
• Exports the new public configuration types and improves workspace-option accessibility
• Bumps @microsoft/vscode-azext-webview to 1.3.0

Release impact

A new @microsoft/vscode-azext-webview release is required before microsoft/vscode-azurefunctions#5127 can replace its local webview tarball. Recommended order:

1. Merge this PR.
2. Publish @microsoft/vscode-azext-webview@1.3.0.
3. Rebase Integrate Azure Functions Skills with Copilot Chat vscode-azurefunctions#5127, switch it to the published package, update its createProject override to accept workspace options after entryPoint, then validate and merge it.

Validation

• npm run lint
• npm run build
• npx mocha --timeout 10000 (53 passing)

[Copilot]

Pull request overview

Adds configurable AI tab text/content for the Template Gallery webview and extends the “continue in chat” handoff to include the selected project location, enabling consuming extensions to customize the Copilot Chat UI copy and receive more context for chat initiation.

Changes:

• Introduces TemplateGalleryConfig.aiGeneration plus a resolved/default AI config used by the webview.
• Updates the AI generation UI to pull all labels/copy/example prompts/capabilities from configuration instead of hardcoding.
• Includes location in the continueInChat message and updates the extension controller handler/signature accordingly.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
webview/src/webview/TemplateGallery/types.ts	Adds AI config types/defaults and extends ContinueInChatMessage with location.
webview/src/webview/TemplateGallery/TemplateGalleryView.tsx	Uses configured AI tab label and passes projectLocation into AiGenerateView.
webview/src/webview/TemplateGallery/TemplateGalleryConfigContext.tsx	Resolves/merges aiGeneration config with defaultAiGenerationConfig for stable consumption.
webview/src/webview/TemplateGallery/components/AiGenerateView.tsx	Replaces hardcoded strings with config-driven content and includes location in the chat handoff.
webview/src/extension/TemplateGalleryController.ts	Updates continueInChat signature and message routing to accept location.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.