Change build system to cmake

[flamewing]

Cross compile system still untested. Moved legacy build files to "legacy-build" directory, where they will remain until I get the documentation building, installing, and updated.

Steps needed:

• [x] Compiling everything with cmake
• [x] Tests run with cmake
• [x] Add cross-compile capability
  • [x] At minimum WASM support (a739088c65406dc74648d0b9b22e796be5e0d938, b9c2eea79eba036a07d8bd5d1fede2c0304db237, a0d85a8058fb4a6d455a7b277b3716ace410a1a7, and 8ea857bbed6de73c9260daef6f408a9eb2855a8c)
• [x] CI run with cmake
  • [x] Windows
  • [x] Linux
  • [x] Mac OS
  • [x] Coverity
  • [x] Cross compile (Linux host):
    • [x] WASM
• [x] Convert documentation to Markdown and put it on Wiki
• [x] Get rid of German documentation (it is not like I will be maintaining it anyway...)
• [x] See which formats are desired for documentation, and have PanDoc convert from markdown to other formats:
  • [x] html: should be useful
  • [x] odt: should be useful
  • [x] docx: ~should be useful~ I will need Word 365 to make the reference document for formatting
  • [x] pdf: ~should be useful~ Output looks bad because tables aren't wrapped automatically
  • [ ] epub: maybe?
  • [x] dvi: questionable utility Most people don't have a way to read this
  • [x] ps: questionable utility Most people don't have a way to read this

[flamewing]

@Clownacy @kirjavascript Any thoughts? I am still working on this, but I'd like to get opinions, and something tells me you two will be the most impacted...

Also, feel free to unsubscribe from the issue after this highlight if the notification spam annoys you... I received over 100 emails so far due to failed builds.

[kirjavascript]

I'm happy as long as it still compiles to WASM, which it looks like it should :+1:

[flamewing]

I'm happy as long as it still compiles to WASM, which it looks like it should 👍

It is already there: you can see it in the tests list — ci-emscripten, and there is a dedicated section on README.md explaining how to do it. So not only does it work, but any changes which break compile to, or tests in, the WASM version will be detected early.