build: use xmake instead of autotools

[lc-soft]

TODO:

• [x] Update directory structure
• [x] Build for UWP (Universal Windows Platform)
• [x] xmake config --with-libpng=y
• [x] xmake config --with-libjpeg=y
• [x] xmake config --with-libxml2=y
• [x] xmake config --with-libx11=y
• [x] xmake config --with-freetype=y
• [x] xmake config --uwp=y
• [x] The test program in the test/ directory should be able to compile and run correctly
• [x] Update config file for GItHub Actions
• [ ] Update make-dist-deb.sh file
• [x] Update README.md

[commit-lint[bot]]

Build System

• use xmake instead of autotools (a0b1ac2)
• update build script for Windows (32e3856)
• change some libraries to shared libraries (b4994c7)
• delete Makefile.am (ebcfc5a)
• fix the link error of thread library (8e86094)
• add enable-openmp option (3052e55)
• add tests (81d09c0)
• remove visual studio project files (c58029b)
• update test/xmake.lua (010ad6f)
• update make-dist-deb.sh (5e27025)
• add test coverage report (ec4893e)
• split gui library (d5db1e1)
• update options and configvars (8010487)
• update includedirs (d2753dd)
• Set the library kind to static (1913ad1)

Code Refactoring

• reduce the dependencies of CSS module (901a568)

Continuous Integration

• github: update steps (78fd551)

Documentation

• update build commands (ef3e470)

Contributors

lc-soft

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[codecov[bot]]

Codecov Report

Merging #248 (1913ad1) into v3.0-dev (85958e4) will increase coverage by 57.75%. The diff coverage is 44.84%.

@@              Coverage Diff              @@
##           v3.0-dev     #248       +/-   ##
=============================================
+ Coverage          0   57.75%   +57.75%     
=============================================
  Files             0       87       +87     
  Lines             0    15725    +15725     
=============================================
+ Hits              0     9082     +9082     
- Misses            0     6643     +6643     

Impacted Files	Coverage Δ
lib/css/src/css_library.c	71.31% <ø> (ø)
lib/font/src/fontconfig.c	100.00% <ø> (ø)
lib/font/src/freetype.c	33.33% <ø> (ø)
lib/font/src/in-core/font_inconsolata.c	50.00% <ø> (ø)
lib/font/src/in_core_font.c	96.00% <ø> (ø)
lib/image/src/bmp.c	79.10% <ø> (ø)
lib/image/src/jpeg.c	68.42% <ø> (ø)
lib/image/src/png.c	40.60% <ø> (ø)
lib/image/src/reader.c	67.36% <ø> (ø)
lib/paint/src/background.c	39.47% <ø> (ø)
... and 163 more

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