Cppcheck-1.76

Cppcheck-1.76 has been released.

General changes:
- Completed CWE mapping
- Support opening project files of external build systems, including CMake and Visual Studio (CLI: --project)
- XML format version 1 is deprecated and will be removed in 1.81

Removed checks:

New checks:

Checking improvements:
- Improved checking for conditions that are always true/false
- Improved format string checking: Support more functions, support %h and %hh
- Improved std.cfg, windows.cfg and qt.cfg; added wxwidgets.cfg
- Improved ValueFlow analysis
- Improved SymbolDatabase accuracy
- Improved Preprocessor (simplecpp)
- Support base class methods in Library

GUI:
- Support opening project files from GUI
- Added .desktop file

Additionally, lots of false positives and bugs have been fixed and several existing checks have been improved.