feat(contentful-copilot): add new Contentful Copilot app

[zacharyyankiver]

Summary

• Adds a new Contentful Copilot app — a chat-style AI agent for managing Contentful spaces via natural language
• Supports multiple LLM providers (Anthropic, OpenAI, Azure, Bedrock, Google) configured via installation parameters
• 24 CMA tools covering content types, entries, assets, locales, tags, releases, archive/unarchive, and entry metadata tag management

Details

• Vercel AI SDK with streamText and multi-step tool use (maxSteps: 15)
• Config screen for provider/model/credential setup (Forma 36 compliant)
• Page location chat UI with streaming, tool call badges, and quick actions
• Agent.tsx ready for when the agent location is enabled

Test plan

• Install app in a Contentful space and configure a provider/model/credentials in the Config screen
• Open the Page location and verify the chat UI loads with quick actions
• Send a natural language message (e.g. "List all content types") and verify streaming response with tool call badges
• Test multi-step tool use (e.g. "Create an entry of type X with field Y set to Z")
• Verify each supported provider (Anthropic, OpenAI, Azure, Bedrock, Google) can be configured and used

🤖 Generated with Claude Code

[wiz-inc-38d59fb8d7]

Wiz Scan Summary

Scanner	Findings
Vulnerabilities	3  2
Sensitive Data	-
Secrets	-
IaC Misconfigurations	-
SAST Findings	-
Software Management Findings	-
Total	3  2

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[zacharyyankiver]

Not ready yet