Setup ai tooling metadata for all repositories

[tortmayr]

Prepare all repositories for usage with Theia AI and claude code.

For Theia AI this includes

• At least a project-info.prompttemplate

For Claude Code

• CLAUDE.md file.
  • Common practice: Reuse theia project template and then add additional info
    ('Read .prompts/project-info.prompttemplate for project information.')
• .claude directory with (optional)
  • skills, agents, commands etc.
• ensure proper .gitignore setup

Progress:
(Add Pr links once available)

• eclipse-glsp/glsp ()
• eclipse-glsp/glsp-client
• eclipse-glsp/glsp-server-node
• eclipse-glsp/glsp-server
• eclipse-glsp/glsp-theia-integration
• eclipse-glsp/glsp-eclipse-integration
• eclipse-glsp/glsp-vscode-integration
• eclipse-glsp/glsp-playwright