chore: add Claude CLI install command to devfile

[olexii4]

What does this PR do?

Adds AI CLI tool install commands to the .devfile.yaml used for developing che in a Che/DevSpaces workspace.

New entry is added:

• install-claude-code command — runs npm install -g @anthropic-ai/claude-code, accessible from the IDE command palette.

- id: install-claude-code
  exec:
    label: "Install Claude Code"
    component: devtools
    workingDir: ${PROJECT_SOURCE}
    commandLine: "npm install -g @anthropic-ai/claude-code"

Screenshot/screencast of this PR

What issues does this PR fix or reference?

fixes #23806

How to test this PR?

1. Deploy Eclipse Che.
2. Open the Create Workspace page and select Import from Git.
3. Paste the repo URL with this branch and create a new workspace.
4. Once the workspace is ready, open the IDE command palette and run:
   • Install Claude Code — installs @anthropic-ai/claude-code globally
5. After installation, run claude in the terminal to confirm the CLI is available and functional.

PR Checklist

As the author of this Pull Request I made sure that:

• The Eclipse Contributor Agreement is valid
• Code produced is complete
• Code builds without errors
• Tests are covering the bugfix or new feature
• The repository devfile is up to date and works
• Sections What issues does this PR fix or reference and How to test this PR completed
• Relevant user documentation updated
• Relevant contributing documentation updated
• CI/CD changes implemented, documented and communicated

Reviewers

Reviewers, please comment how you tested the PR when approving it.