Cmake buildsystem

[m-simonelli]

Summary of changes:

• Update .gitignore to not conflict with new build system
• Added @pospeselr and myself to AUTHORS.md
• Ripped out config.tests
• Ripped out qmake based build system
• Debian packaging:
  • We can now generate source packages properly!
  • Updated old debian/copyright file to comply with new specification
  • Removed all icons except 48x48 and .svg
    • 48x48 is left as an icon for the menu bar IIRC
    • Scalable is used for everything else
    • No other icons are needed
  • Moved all icons out of the old directories, as they don't particulary belong there. They exist now in src/ricochet-refresh/resources/*
  • Said icons are now installed by cmake in the install stage of the build
• Removed redundant packaging/ directory
  • That said, RBM packaging now has to be implemented again :/
  • It's on the TODO list :)
• Migrated everything to use CMake
  • All the common parts are in the src/cmake directory
    • This includes things like LTO for a target, compiler flags (i.e. enable all warnings) etc
    • This directory also contains toolchain files, for ease of use with ricochet-build
  • Sanitizers are available, and require a configure time switch to be set
    • It integrates very nicely with GUI/TUI interfaces for CMake as well
    • Available sanitizers include:
    • Clang/GCC:
      • Thread sanitizer
      • UB sanitizer
      • Leak sanitizer
      • Address sanitizer
      • Memory sanitizer is NOT supported for GCC
    • MSVC
      • Address sanitizer
      • TODO: I did check, but documentation was lacking. I'm not completely sure if ASan is the only sanitizer supported by MSVC, but I'm fairly sure
  • Compilers have all reasonable warnings set, except for some that flood the output due to protobuf's/qt's generated files
• (Nearly) all warnings removed
  • Nearly because there's some variance in the warnings I get from different compilers. On my system, no warnings are thrown - however, in ricochet-build, due to a variety of compilers being used for differnet platforms, there are a considerable amount.
    • Also there's warnings thrown due to deprecation notices in protobuf, and my protobuf is out of date. These will be fixed soon ish
• safe_cast template implemented as we use a lot of demotion casts for QT, ie size_t -> int. This template will check for overflow before casting, and crash if it will.
• Fixed a lot of instances of variable shadowing
• Implemented catch2 framework for easy test writing.
  • And also removed the old testing framework
• Replaced some interesting logic in tego_ui/utils/Settings.cpp where a normal iterator was created to the end of a container, and then iterated in reverse. This has been replaced with a reverse iterator
• Added the NSHighResolutionCapable attribute for macOS to support HiDPI/retina
• Converted the scalable svg icon from an encoded png wrapped in an svg, to an actual svg file. This was previously making the icon useless on linux systems

[m-simonelli]

TODO: Documentation for the new and improved build system. I'll get around to this when the MR is approved

[morganava]

Looks great, thanks! Merged into main