refactor(model-form): Glimmer Components

[guidojw]

ref #530

Summary

Realised in #529 that the model-form components need to be refactored quite a lot so thought it would be a good idea to do this in a separate PR. This is also the PR that introduces TypeScript via ember-cli-typescript, because I was gonna do the new components in TypeScript.

Other information

@types/eslint-scope's resolution is overridden to ^7.0.0 because webpack has a bug where @types/eslint-scope is in its dependencies instead of devDependencies, this can be removed from the package.json when webpack/webpack#15772 is resolved.

[DrumsnChocolate]

@guidojw what do you mean by yarn install being broken? is that why the build fails?

[guidojw]

@guidojw what do you mean by yarn install being broken? is that why the build fails?

It installs two versions of the same @types package (@types/eslint-scope to be specific) and thus TypeScript building fails because of overlapping types. I fixed yarn.lock to have it not do that which works as a temporary fix in dev.
However because of the --immutable flag and yarn wanting to update yarn.lock because it's technically incorrect, the command in CI here fails.

webpack/webpack#15772 should fix this.

(also this PR is far from finished)

[DrumsnChocolate]

I did run into some build errors yeah, I just tried testing this PR and it tells me exactly what you mentioned, duplicate declarations of the same identifiers. I'll wait with reviewing this until you think it's ready then.

[guidojw]

Yeah I will undraft it when it's ready 👍🏿

[guidojw]

This now builds

[DrumsnChocolate]

I think I will breathe some new life into this PR once #635 and #896 are merged

[DrumsnChocolate]

This is also the PR that introduces TypeScript via ember-cli-typescript, because I was gonna do the new components in TypeScript.

If you don't mind, I will separate this from the refactor to glimmer. I like the idea of using typescript for our components, but for the sake of getting up to date with other dependencies we need to upgrade our ember version asap. In contrast, TS is more of a nice to have.

Adding the introduction of TS as a todo in #429