Release 0.1.0: MIT license, changelog, multi-arch Docker image without CLI builds

- LICENSE (MIT), CHANGELOG for 0.1.0, README overhaul
- docker-compose.release.yml pulling the registry image
- Dockerfile cross-compiles the server with cargo-zigbuild for amd64 and arm64;
  the terminal client is no longer built into the image
- Server, install script and settings point to a source install of the
  terminal client when no prebuilt binaries are available (/info: cli_builds)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

web/src/types.ts

@@ -193,6 +193,8 @@ export interface Info {
   /** Newer release (admins only). */
   update?: { version: string; url: string; notes: string } | null;
   setup_required: boolean;
+  /** Prebuilt terminal client binaries can be downloaded from this server. */
+  cli_builds?: boolean;
   oidc: { label: string } | null;
   user: User | null;
 }