minor and major reworks: rename swb to SRU, add a test for pdf parsing

major: rework mail to send mail as plaintext instead of html, preventing the bleed-in of html text

src/ui/widgets/admin_query.py

@@ -1,9 +1,10 @@
-from .widget_sources.admin_query_ui import Ui_Form
+from PySide6 import QtCore, QtWidgets
 
-from PySide6 import QtWidgets, QtCore
 from src import Icon
 from src.backend import Database
 
+from .widget_sources. import Ui_Form
+
 
 class AdminQueryWidget(QtWidgets.QWidget, Ui_Form):
     def __init__(self, parent=None):
@@ -22,7 +23,7 @@ class AdminQueryWidget(QtWidgets.QWidget, Ui_Form):
             return
 
         data = self.db.query_db(request_text)
-        print(data)
+        # print(data)
         table_names = (
             request_text.lower().split("select")[1].split("from")[0].split(",")
         )