Organize internationalized documentation

[patricklodder]

Implements proposal from #3436

1. Creates a new structure in doc/intl/, where each language gets their own folder and a central README.md that lists all translated documents
2. Moves current translated README files into this structure
3. Removes cross linking, introduces hierarchical linking

[slightlyskepticalpotat]

Missed this a few months ago—it definitely seems like an improvement from how we do things right now.

[patricklodder]

Accidentally did a bad commit so I had to fix it.

[daank-c]

Nice, looks good. Although, I'm thinking now too that there should also be a policy written somewhere explaining this part of your proposal:

"... All translated documents are required to be up-to-date by release time, or they will be deleted and unlinked from the release (depending on which branching strategy we'll pursue). This prevents distributing outdated information with a release."

Perhaps it would be good to write that in doc/intl/README.md, as I think that's probably the most likely place for contributors and maintainers to look.

[qlpqlp]

Nice, looks good. Although, I'm thinking now too that there should also be a policy written somewhere explaining this part of your proposal:

"... All translated documents are required to be up-to-date by release time, or they will be deleted and unlinked from the release (depending on which branching strategy we'll pursue). This prevents distributing outdated information with a release."

Perhaps it would be good to write that in doc/intl/README.md, as I think that's probably the most likely place for contributors and maintainers to look.

If you also want to help organise the documentation here https://dogecoincore.com/
I will appreciate it, you can do so easily here https://github.com/qlpqlp/dogecoin-core-docs/tree/main/
Just clone and on src/ folder you will see all languages, but for now only src/en/ is all documented

I don't mind to move this repo to dogecoin repo because it will only contain CORE documentation :)

[daank-c]

@qlpqlp I don't have time for any more commitments atm, sorry fren.

[qlpqlp]

@qlpqlp I don't have time for any more commitments atm, sorry fren.

No worries <3, I will then update wen I have some more motivation :) (time I always find out, motivation is the only barrier for me at the moment lol)