Running \`claudemesh\` with no args now detects install state and
prints context-appropriate guidance: suggests \`install\` if MCP
not registered, \`join\` if no meshes, \`launch\` if ready.
Replaces the static HELP dump with a first-run wizard that meets
users where they are.
Static HELP still available via --help.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
