Xmake v2.6.8 release, compilation cache improvement

New characteristics

• #2447: add to qt.qmlplugin Rules and qmltypesregistrar Support
• #2446: Support target Group installation
• #2469: produce vcpkg-configuration.json

improvement

• add to  preprocessor.linemarkers  Policy to disable linemarkers De acceleration ccache/distcc
• #2389: improvement  xmake run  Support parallel running of target programs
• #2417: Switch option/showmenu The default value of , Default on
• #2440: Improve the failure error message of the installation package
• #2438: Make sure that the generated vsxmake The project will not change randomly
• #2434: Improve the plug-in manager , Allow multiple plug-ins to manage
• #2421: Improved configuration options menu
• #2425: add to  preprocessor.gcc.directives_only  Strategy
• #2455: improvement emcc Optimization options for
• #2467: Support fallback to original file compilation , compatible msvc Some problems with the preprocessor
• #2452: add to build.warning Strategy

Bugs Repair

• #2435: Repair failed to search with  .  The package name
• #2445: Repair windows On ccache Build failure problem
• #2452: Repair ccache Next , Warning about problems that cannot be output