feat: Add centralized logging system with @link-stack/logger package

- Create new @link-stack/logger package wrapping Pino for structured logging
- Replace all console.log/error/warn statements across the monorepo
- Configure environment-aware logging (pretty-print in dev, JSON in prod)
- Add automatic redaction of sensitive fields (passwords, tokens, etc.)
- Remove dead commented-out logger file from bridge-worker
- Follow Pino's standard argument order (context object first, message second)
- Support log levels via LOG_LEVEL environment variable
- Export TypeScript types for better IDE support

This provides consistent, structured logging across all applications
and packages, making debugging easier and production logs more parseable.

apps/link/app/_actions/search.ts

@@ -1,6 +1,9 @@
 "use server";
 import { executeGraphQL } from "app/_lib/zammad";
 import { searchQuery } from "@/app/_graphql/searchQuery";
+import { createLogger } from "@link-stack/logger";
+
+const logger = createLogger('link-search');
 
 export const searchAllAction = async (query: string, limit: number) => {
   try {
@@ -11,7 +14,7 @@ export const searchAllAction = async (query: string, limit: number) => {
 
     return result?.search;
   } catch (e) {
-    console.error(e.message);
+    logger.error({ error: e }, "Error occurred");
     return [];
   }
 };