Add default tsconfig.json

[ThaNarie]

To align between all our skeletons, easily setup up other projects, and to align with our other standards, it would be good to define a "default" tscofig.json.

I think we can use use an existing one (from muban or vue-skeleton), and tweak it a bit.

Feel free to add to this list of "musts" or "discussion points":

• "strict": true - Already our default

• "importsNotUsedAsValues": "error" - Forces explicit type imports, added in TS 3.8; import type { Foo } from './foo-types'; - This also prevents errors on the no-cycle, which don't apply to types (or not in normal use cases anyway).

• "forceConsistentCasingInFileNames": true, - to align with our eslint rule

• "noImplicitAny": true, - If a type is inferred as any, you have to explicitly type it - note that in our lint rules, we also don't allow the use of explicit any.

• "noUnusedLocals": true - Don't leave unused code

• "noUnusedParameters": true - Don't leave unused code

[skulptur]

shouldn't noUnusedParameters be true for it to complain about unused code?

[skulptur]

noImplicitAny is true if strict is true. But how about we start from a tsconfig that lists every option and we explicitly set everything ourselves to make it obvious rather than relying on TS defaults and flags that affect other flags?

[skulptur]

https://github.com/mediamonks/frontend-coding-standards/pull/12

[gianko]

~related (maybe?), and for VSCode~

~https://code.visualstudio.com/docs/languages/jsconfig~

not needed if theres a tsconfig

https://code.visualstudio.com/docs/nodejs/working-with-javascript#_migrating-to-typescript