feat: initialize FastAPI project structure with job posting routes and models

src/lib/exceptions.py

@@ -0,0 +1,9 @@
+from fastapi import HTTPException, status
+
+
+class NotImplementedException(HTTPException):
+    def __init__(self):
+        super().__init__(
+            status_code=status.HTTP_501_NOT_IMPLEMENTED,
+            detail="Not implemented yet",
+        )