refactor: fix secret imports, move to pkg folder

main.py

@@ -14,7 +14,7 @@ from tconnectsync.api.common import ApiException
 from tconnectsync.process import process_time_range
 
 try:
-    from secret import (
+    from tconnectsync.secret import (
         TCONNECT_EMAIL,
         TCONNECT_PASSWORD,
         PUMP_SERIAL_NUMBER,

tconnectsync/nightscout.py

@@ -5,7 +5,7 @@ import time
 import urllib.parse
 
 try:
-    from secret import NS_URL, NS_SECRET, TIMEZONE_NAME
+    from .secret import NS_URL, NS_SECRET, TIMEZONE_NAME
 except Exception:
     print('Unable to import Nightscout secrets from secret.py')
     sys.exit(1)

tconnectsync/parser.py

@@ -2,7 +2,7 @@ import sys
 import arrow
 
 try:
-    from secret import TIMEZONE_NAME
+    from .secret import TIMEZONE_NAME
 except Exception:
     print('Unable to import parser secrets from secret.py')
     sys.exit(1)