chore: the homeassistant catalog entry lands in its own catalog-only PR

Catalog entry PRs may only touch plugin-catalog/** (pinned-source-validate), so the entry moves to a
separate PR that lands first; the migration installs it from the live catalog once both are in.

plugin-catalog/homeassistant.yaml

@@ -1,23 +0,0 @@
-name: homeassistant
-repo: https://github.com/NousResearch/hermes-homeassistant
-sha: f272c96b9a538a2327b23023341f571e563ea475
-description: 'Home Assistant gateway platform (state-change events in, persistent notifications and cron notify
-  delivery out) plus the homeassistant toolset (ha_list_entities, ha_get_state, ha_list_services, ha_call_service).
-  Formerly built into Hermes core; existing users are migrated automatically.'
-maintainer: NousResearch
-tier: official
-category: platform
-requires_hermes: ">=0.21.5"
-version: "2.0.0"
-docs_url: https://github.com/NousResearch/hermes-homeassistant
-platforms: []
-capabilities:
-  provides_tools:
-    - ha_list_entities
-    - ha_get_state
-    - ha_list_services
-    - ha_call_service
-  provides_hooks: []
-  provides_middleware: []
-  requires_env:
-    - HASS_TOKEN