gitlink-cli/doc/changes/feedback-shortcut.md

Feedback shortcut

This change adds a dedicated feedback shortcut group for submitting GitLink platform feedback from the CLI.

New command:

• feedback +create

The command wraps POST /api/v1/{owner}/feedbacks.json and improves the CLI experience around the narrow API payload:

• Resolves the current authenticated user with GET /users/me when --user is omitted.
• Accepts feedback text from --content, --from, and --stdin, combining multiple sources with blank lines.
• Adds optional metadata lines for --category, --contact, and --repo-ref before the body.
• Supports --dry-run to preview method, path, payload, and content length without submitting.
• Rejects empty feedback before making any API request.

Documentation was added to README, README.zh-CN, and skills/gitlink-feedback/SKILL.md.

Verification:

• go test ./shortcuts/feedback
• go test ./shortcuts
• go test ./...
• go build ./...
• git diff --check
• UTF-8 mojibake scan on touched files