feat(hass): use ha-fallback with custom sentences

legacyPackages/hass-components/default.nix

@@ -4,6 +4,7 @@ pkgs.lib.makeScope pkgs.newScope (hass: let
     hass.callPackage file (inputs // extraArgs // {});
 in {
   extended-ollama-conversation = buildHassComponent ./extended-ollama-conversation {};
+  ha-fallback-conversation = buildHassComponent ./ha-fallback-conversation {};
   netdaemon = buildHassComponent ./netdaemon {};
   spotifyplus = import ./spotifyplus ({inherit buildHassComponent;} // inputs);
   tuya-local = buildHassComponent ./tuya-local {};

legacyPackages/hass-components/ha-fallback-conversation/default.nix

@@ -0,0 +1,16 @@
+{
+  ha-fallback-conversation-src,
+  buildHomeAssistantComponent,
+  ...
+}: let
+  inherit (builtins) fromJSON readFile;
+
+  manifest = fromJSON (readFile "${ha-fallback-conversation-src}/custom_components/fallback_conversation/manifest.json");
+in
+  buildHomeAssistantComponent {
+    owner = "m50";
+
+    inherit (manifest) domain version;
+
+    src = ha-fallback-conversation-src;
+  }