add: custom like emoji per instance, fix like

This fixes the fact that likes on mastodon didn't get federated properly and let's instance admins choose a custom emoji

packages/backend/src/queue/processors/ImportNotesProcessorService.ts

@@ -364,7 +364,7 @@ export class ImportNotesProcessorService {
 		let title;
 		const files: MiDriveFile[] = [];
 
-		function decodeIGString(str: any) {
+		function decodeIGString(str: string) {
 			const arr = [];
 			for (let i = 0; i < str.length; i++) {
 				arr.push(str.charCodeAt(i));