IDE and code editor plugin support

[waruqi]

• [x] Vim Editor Plugin
  • [x] xmake.vim (third-party, thanks @luzhlon)
• [x] Visual Studio Code Editor Plugin (xmake-vscode)
• [x] Sublime Text Editor Plugin (xmake-sublime)
• [ ] Atom Editor Plugin
• [ ] Emacs Editor Plugin
• [x] Visual Studio IDE Plugin
  • [x] xmake project -k vsxmake
  • [x] xmake-visualstuido
• [ ] Eclipse IDE Plugin
• [x] IntelliJ-based IDE Plugin (xmake-idea)
  • [x] IntelliJ
  • [x] CLion
  • [x] Android Studio
• [x] Android Gradle Plugin (xmake-gradle)
• [x] Qt Creator Plugin (xmake-project-manager)

[waruqi]

#88