Plugin catalog: homeassistant (official, NousResearch)

The Home Assistant gateway platform and ha_* tools as a standalone catalog plugin
(NousResearch/hermes-homeassistant). Core still bundles Home Assistant until #132469 lands; that
PR removes the bundled copy and migrates every profile that used it onto this entry.

plugin-catalog/homeassistant.yaml

@@ -0,0 +1,23 @@
+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