add method and route to search across tracks, albums and artists.

+ break models into separate files
+ same for the utils and setup

app/lib/watchdogg.py

@@ -8,7 +8,6 @@ import time
 from watchdog.events import PatternMatchingEventHandler
 from watchdog.observers import Observer
 
-
 from app.logger import log
 from app.db.store import Store
 from app.lib.taglib import get_tags
@@ -91,6 +90,9 @@ class Watcher:
                 "WatchdogError: Failed to start watchdog,  root directories could not be resolved."
             )
             return
+        except OSError as e:
+            log.error('Failed to start watchdog. %s', e)
+            return
 
         try:
             while True: