feat: allow dynamically enabling and disabling extensions

Signed-off-by: aramissennyeydd <aramis.sennyey@doordash.com>

packages/frontend-internal/package.json

@@ -23,6 +23,7 @@
     "test": "backstage-cli package test"
   },
   "dependencies": {
+    "@backstage/filter-predicates": "workspace:^",
     "@backstage/frontend-plugin-api": "workspace:^",
     "@backstage/types": "workspace:^",
     "@backstage/version-bridge": "workspace:^"

packages/frontend-internal/src/wiring/InternalExtensionDefinition.ts

@@ -28,6 +28,7 @@ import {
 // eslint-disable-next-line @backstage/no-relative-monorepo-imports
 import { ResolvedExtensionInputs } from '../../../frontend-plugin-api/src/wiring/createExtension';
 import { OpaqueType } from '@internal/opaque';
+import { FilterPredicate } from '@backstage/filter-predicates';
 
 export const OpaqueExtensionDefinition = OpaqueType.create<{
   public: OverridableExtensionDefinition<ExtensionDefinitionParameters>;
@@ -70,6 +71,7 @@ export const OpaqueExtensionDefinition = OpaqueType.create<{
         readonly name?: string;
         readonly attachTo: ExtensionDefinitionAttachTo;
         readonly disabled: boolean;
+        readonly enabled?: FilterPredicate;
         readonly configSchema?: PortableSchema<any, any>;
         readonly inputs: { [inputName in string]: ExtensionInput };
         readonly output: Array<ExtensionDataRef>;