[WIP] Modernise ember-leaflet

[MichalBryxi]

• WIP!
• This is to start fixing things to allow the addon users upgrade their apps
• First step to be able to convert the addon to v2

TODOs

• Uses WIP branch of ember-cli-addon-docs
  • Wait for merge: fix: handlebars parser@2.2.0 ember-learn/ember-cli-addon-docs#1670
  • Wait for merge: breaking: require Node.js version >= 20.19 ember-learn/ember-cli-addon-docs#1671
  • Wait for merge: fix: Remove ember-cli-string-helpers ember-learn/ember-cli-addon-docs#1672
  • Wait for ember-cli-addon-docs release and re-pin version
• Make all thetest:ember-scenario pass
  • Scenario embroider-safe: FAIL
  • Scenario embroider-optimized: FAIL
• Make all ember:test pass
• Revert some of the blindly made changes where they don't make sense

[jelhan]

@MichalBryxi This addon has been adopted. I started modernizing. If you have time, please check if something from this PR should still go in. Or if it was fully done by #702 already.

All other contributions to get this addon to a modern v2 addon are highly welcome as well.

[MichalBryxi]

@jelhan \o/ yay! Thank you! This contained just a set of critical changes to get it to v2 addon. So as long as you get there somehow, it should be grand. Thanks again!

[jelhan]

@jelhan \o/ yay! Thank you! This contained just a set of critical changes to get it to v2 addon. So as long as you get there somehow, it should be grand. Thanks again!

Thanks a lot for reviewing. I fear getting to v2 addon may not be that easy. The design if the componentsToYield doesn't seem to play well with Embroider unless using ensure-safe-component helper. My current goal is to make it work in a modern Ember stack. Bit I'm not sure if I have enough time for refactoring it to allow shipping as v2 addon.