feat: add one-ide-cli and editor-context skill

[tangcent]

Changes

• Add cli/ — a TypeScript CLI package (one-ide-cli) published to npm that reads live editor state from ~/.one-ide/cluster/state.json
• Add skills/editor-context/ — an agent skill guiding terminal AI tools (claude, gemini-cli, kiro-cli, codex, etc.) to use one-ide-cli context <workspace> to detect IDE context
• Update README.md with skills install instructions via npx skills add tangcent/one-IDE -g -y

CLI Commands

one-ide-cli context <project-path>   # full context: active file, selection, open files, file text
one-ide-cli active-project           # workspace root
one-ide-cli active-file <path>       # active file
one-ide-cli opened-files <path>      # open editor tabs
one-ide-cli ide                      # IDE name

Install

npm install -g one-ide-cli

Or install the skill to all AI tools:

npx skills add tangcent/one-IDE -g -y