[FEATURE] Ask Addon Authors to use LGTM CI analysis

[luzpaz]

Is your feature request related to a problem? Please describe.
Standardizing code quality in all Addons

Describe the solution you'd like
Using LGTM

Additional context
Asking Authors to add a .lgtm.yml file and sign up for their free service to run a check on their specific Addon repo so it generates a report of issues to be fixed.

• [ ] 3D_Printing_Tools
• [x] A2plus
• [x] AirPlaneDesign
• [ ] animation
• [ ] ArchTextures
• [ ] assembly2
• [x] Assembly4
• [ ] Autoload
• [ ] BCFPlugin
• [ ] BIM
• [ ] BIMBots
• [x] BOLTSFC
• [ ] CADExchanger
• [ ] cadquery_module
• [ ] Cfd
• [x] CfdOF
• [ ] CommandPanel
• [ ] CubeMenu
• [ ] cura_engine
• [ ] CurvedShapes
• [x] Curves
• [x] Defeaturing
• [ ] DesignSPHysics
• [ ] dodo
• [ ] drawing_dimensioning
• [ ] dxf_library
• [ ] DynamicData
• [x] EM
• [ ] ExplodedAssembly
• [x] fasteners
• [x] FCGear
• [ ] flamingo
• [ ] frame
• [ ] GDML
• [ ] GDT
• [ ] geodata
• [ ] Geomatics
• [ ] Glass
• [ ] icons
• [ ] IconThemes
• [ ] InventorLoader
• [ ] kerkythea
• [ ] kicadStepUpMod
• [x] lattice2
• [ ] Launcher
• [ ] LCInterlocking
• [ ] Lithophane
• [ ] Manipulator
• [ ] MeshRemodel
• [ ] MOOC
• [ ] NavigationIndicator
• [ ] nurbs
• [ ] Part-o-magic
• [ ] parts_library
• [ ] pcb
• [ ] persistenttoolbars
• [ ] PieMenu
• [ ] Plot
• [ ] pluginloader
• [ ] pyrate
• [ ] reconstruction
• [x] Reinforcement
• [ ] RemBench
• [ ] Render
• [ ] Reporting
• [ ] ~retr3d~
• [ ] SelectorToolbar
• [x] sheetmetal
• [ ] Ship
• [ ] ShortCuts
• [ ] Silk
• [ ] slic3r-tools
• [ ] SlopedPlanesMacro
• [ ] symbols_library
• [ ] TabBar
• [ ] ThreadProfile
• [ ] timber
• [ ] ToolbarStyle
• [ ] WebTools
• [ ] workfeature
• [ ] workfeature-macro
• [ ] yaml-workspace

[luzpaz]

Related ticket: https://github.com/FreeCAD/FreeCAD-macros/issues/73

[Thovthe]

Defeaturing should get a checkmark.

[luzpaz]

LGTM has now been sunset as a service: https://github.blog/2022-08-15-the-next-step-for-lgtm-com-github-code-scanning/