How to use same enum in multiple files in Typescript without import

Question

I've been struggling with this now longer than I should and surprisingly, the existing questions (and there are many) don't really help further.

My goal is to declare and define enum on a global level, such that I can use that said enum in any file without having to import them. Now, to my understand you can't do this with a d.ts file. I also saw other work arounds (e.g. this one https://github.com/Microsoft/TypeScript/issues/14975 ) that don't seem best-practice but rather a "fix". Or questions, that aren't fully answered (e.g. Enums in typescript d.ts file )

Now, apparently a way to go is to create a common.ts and handle any enum in that file. How exactly do I have to proceed in order to make this possible:

Some global.ts file

 enum someEnum{
        first = 'someString',
        second = "someOtherString'
    }

a.ts file

//without any imports
const myFirstEnumValue = someEnum.first // resulting in "someString"

Context

I'm writing a React, Electron App and don't want to declare/define my enums twice, in electron.ts (sometimes called main) and in any react file. This works without any issue with types and interfaces in a file called types.d.ts (filepath is added to typeRoots in tsconfig.json) but again, not with enums