feat(cli): extract Obelisk runtime into npm package

Add @obelisk-apps/cli with the existing build, search, query, and attune contract plus official skill installation.

Separate the docs-only skill artifact, bootstrap installer, release layout, cross-platform CI, and package-level regression coverage.

packages/cli/README.md

@@ -0,0 +1,16 @@
+# Obelisk CLI
+
+The local Obelisk runtime used by coding agents. It indexes Claude Code and
+Codex transcripts into `~/.obelisk/obelisk.sqlite` and exposes the stable
+`build`, `search`, `query`, and `attune` process interface.
+
+```bash
+npm install --global @obelisk-apps/cli
+obelisk --version
+obelisk install
+obelisk --query /tmp/query.mjs
+```
+
+`obelisk install` installs the separate docs-only agent skill from
+`tommy0103/obelisk-skill`. The CLI itself remains daemon-free: each command
+refreshes the local index when write ownership is available, then exits.