refactor: reorganize panel/widget file structure and standardize UI setup

[Robert0Mart]

Description

• refactor

• organized the rest of the widgets into a common folder

• standardized setup UI cross files

• updated tests based on the changes (paths and comments)

by : @gmmcosta15

File architecture

• lib/panels/ : mainWindow.py, controlTab.py, filamentTab.py, printTab.py, utilitiesTab.py, networkWindow.py
• lib/panels/widgets/
  • bannerPopup.py
  • common/ : basePopup.py, popupDialogWidget.py, keyboardPage.py, numpadPage.py, slider_selector_page.py, loadWidget.py, optionCardWidget.py
  • ControlTab/ : axisPage.py, extruderPage.py, fansPage.py, printcorePage.py, probeHelperPage.py, temperaturePage.py
  • FilamentTab/ : addFilamentPage.py, addSpoolPage.py, colorWheelWidget.py, amuPage.py, amuWidgets.py, basicFilamentPanel.py, spoolmanPage.py
  • MainWindow/ : cancelPage.py, connectionPage.py, notificationPage.py, updatePage.py
  • PrintTab/ : babystepPage.py, confirmPage.py, filesPage.py, jobStatusPage.py, sensorsPanel.py, sensorWidget.py, tunePage.py
  • UtilitiesTab/ : inputshaperPage.py, troubleshootPage.py