feat: introduce platform defs for adding additional spotlight searchers (#3631)

packages/hoppscotch-common/src/platform/spotlight.ts

@@ -0,0 +1,10 @@
+import { Service } from "dioc"
+import { SpotlightSearcher } from "~/services/spotlight"
+
+export type SpotlightPlatformDef = {
+  additionalSearchers?: Array<
+    typeof Service<unknown> & { ID: string } & {
+      new (): Service & SpotlightSearcher
+    }
+  >
+}