Rename @mariozechner/pi-coding-agent to @earendil-works/pi-coding-agent

Pi moved to its new home at earendil-works on 2026-05-07
(https://pi.dev/news/2026/5/7/pi-has-a-new-home).

The old @mariozechner/pi-coding-agent npm package is deprecated with
the explicit message 'please use @earendil-works/pi-coding-agent
instead going forward', and the version stream has moved on (old
top-out 0.73.1; new currently 0.74.0). Anyone npm-installing the old
name today gets a deprecation warning + a stale binary, so this is
a non-optional migration before the next tagged release.

Sweep:
- Dockerfile (production single-Dockerfile path) and Dockerfile.variant
  (split-base path on main): npm install -g target updated.
- README, AGENTS, HUB_TEMPLATE: github.com/mariozechner/pi-coding-agent
  URL refs (which now 404) -> github.com/earendil-works/pi.
- DOCKER_HUB.md regenerated (5529 bytes, ~78% headroom).
- CHANGELOG Unreleased: rename entry added with migration context.

Brew install references (`brew install pi-coding-agent`) left as-is:
formula still works at 0.73.1 and a homebrew tap update is tracked
upstream at earendil-works/pi#2755.

Historical CHANGELOG entries: only github URL refs updated (the
package name was never spelled out in those entries; we're correcting
dead hyperlinks, not rewriting feature descriptions).

DOCKER_HUB.md

@@ -10,7 +10,7 @@ Designed for teams who want a reproducible coding-agent setup that runs the same
 |---|---|
 | `latest` / `vX.Y.Z` | Base image — opencode, Node.js, AWS CLI, dev tools |
 | `latest-omos` / `vX.Y.Z-omos` | Base + [oh-my-opencode-slim](https://github.com/alvinunreal/oh-my-opencode-slim) multi-agent orchestration and Bun |
-| `latest-with-pi` / `vX.Y.Z-with-pi` | Base + [pi](https://github.com/mariozechner/pi-coding-agent) as alternative/complementary harness (shares the mempalace install with opencode) |
+| `latest-with-pi` / `vX.Y.Z-with-pi` | Base + [pi](https://github.com/earendil-works/pi) as alternative/complementary harness (shares the mempalace install with opencode) |
 | `latest-omos-with-pi` / `vX.Y.Z-omos-with-pi` | OMOS + pi together |
 
 All variants support `linux/amd64` and `linux/arm64`.
@@ -48,7 +48,7 @@ For docker-compose users, the source repo provides `docker-compose.yml`, `.env.e
 ## What's Inside
 
 - **[opencode](https://opencode.ai)** — primary coding-agent harness. Multi-provider (Anthropic, OpenAI, Bedrock, Google, Groq, etc.).
-- **[pi](https://github.com/mariozechner/pi-coding-agent)** *(in `*-with-pi` variants)* — lightweight TUI coding-agent that coexists with opencode and shares the same mempalace install. Includes the `mcp-loader` extension so any local-stdio or remote streamable-HTTP MCP server (searxng, gitea, context7, …) can be added by editing `~/.pi/agent/settings.json`.
+- **[pi](https://github.com/earendil-works/pi)** *(in `*-with-pi` variants)* — lightweight TUI coding-agent that coexists with opencode and shares the same mempalace install. Includes the `mcp-loader` extension so any local-stdio or remote streamable-HTTP MCP server (searxng, gitea, context7, …) can be added by editing `~/.pi/agent/settings.json`.
 - **[mempalace](https://github.com/MemPalace/mempalace)** — persistent AI memory layer (ChromaDB + SQLite). Wing/diary/knowledge-graph entries are mutually visible to opencode and pi.
 - **[oh-my-opencode-slim](https://github.com/alvinunreal/oh-my-opencode-slim)** *(in `*-omos` variants)* — multi-agent orchestration on top of opencode (council, fallback chains, named agents).
 - **AWS CLI v2** with SSO support, **Node.js LTS**, **Bun** (OMOS variants), **uv** (Python), **gosu** for clean UID/GID adjustment to match your host workspace.