feat: install TypeScript & update dependencies

[mkszepp]

extends #164

following changes were done

• update ember-cli to 5.8
• fix typescript errors
• activate const lint rule (default is on)
• update all packages
• update ember-cli-babel (this was a braking change for now!) -> when we are move later to v2 addon this will not be braking
• switch to package-manager pnpm (its easier moving now, instead switching while v2 addon migration)

Atm we are compatbile to v3.20+ (like before, but we should support in future only v3.28+)

Using native types instead of typed packages we will do in v2 migration. Also glint support will be added in v2 migration.

Please look commit per commit, to understand everything what was changed

[mkszepp]

@RobbieTheWagner @esbanarango this changes are ready for merge (test scenarios should pass, at least local it works 😊). When this changes are landed, we can go on with moving everything to a v2 addon

[mkszepp]

@charlesfries @esbanarango i'm not 100% sure, but i thinks the "model" typing is atm not correctly... we do require ember-data models, which is very strict... i think correct should be something like this:

export interface Model {
  [key: string]: unknown;
}

I will replace it while v2 addon migration. Let me know if I'm right about this

[mkszepp]

@RobbieTheWagner we should also label this PR... its enhancement & internal (only TS was added & addon was updated to v5.8)

[RobbieTheWagner]

@mkszepp you say updating ember-cli-babel is a breaking change. If so, we should label this breaking.

[mkszepp]

@RobbieTheWagner i was in opinion, that is braking, because we change dependency... but upgrade docs says its never braking see https://github.com/emberjs/ember-cli-babel/blob/master/UPGRADING.md#upgrade-path-for-addons . so its okay to label only as enhancement.

In additional we have converted to v2 addon, so its never braking