Add a new template to dev.coder.com for developing the coder/vscode-coder
VS Code extension.
The Docker image is based on node:24-slim (pinned by digest) with git, gh
CLI, dbus, and sudo. Electron system libraries are installed at workspace
startup via playwright install-deps so they stay in sync with the project's
Electron version without Dockerfile changes.
The template includes IDE selection (VS Code Desktop, code-server, Cursor,
etc.), filebrowser, dotfiles, and Claude Code for AI tasks.