Generate stub

[ellnix]

This is where you witness my descent into madness. Also:

• Fixes #17

Update 2023-12-09:

Necessary parts are done, left to do:

• [x] Use correct case in variable names in stub (using the 'variable_name_format' key in stub_config.toml, so that the templates do not have to worry about case)
  • [X] Apply it to Reads
  • [x] https://github.com/ellnix/clash/issues/9
  • [x] https://github.com/ellnix/clash/issues/10
  • [x] https://github.com/ellnix/clash/issues/11
  • [x] https://github.com/ellnix/clash/issues/12
  • [x] https://github.com/ellnix/clash/issues/13
• [x] Refactor
  • [x] Replace unwrap and expect s with better messages
  • [X] Properly squeeze multiple newlines
  • [x] Make the formatter happy
• [X] Add stubs in more languages to find problems with implementation
• [X] Rethink how "type tokens" are added to the template
  • [X] Are there languages that need more than one arbitrary token per type?
• [x] Fix template formatting for consistency
  • [x] https://github.com/ellnix/clash/issues/8
  • [x] Smaller things
  • [x] https://github.com/ellnix/clash/issues/7
• [x] https://github.com/ellnix/clash/issues/5

[ellnix]

Forgive us for our sins @Andriamanitra