libreoffice, hyphen: Load hyphen dicts in LibreOffice, modularize hyphen dicts, add german hyphen dict

[theCapypara]

Description of changes

Fixes parts of #14430

Let me know if I should split this PR! I needed all these things so I added and tested them together.

1. Makes sure that all hyphen dictionaries are loaded for LibreOffice (1st commit)
2. Adds a new package group hyphenDicts that follows the same principle as hunspellDicts (2nd commit)
3. Removes the en_US dict from hyphen and moves it to hyphenDicts.en_US (2nd commit)
4. Adds the hyphen dictionaries de_DE, de_CH, de_AT

NOTE: This is a breaking change, as hyphen now no longer contains the en_US dictionary.

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandboxing enabled in nix.conf? (See Nix manual)
  • sandbox = relaxed
  • sandbox = true
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 24.11 Release Notes (or backporting 23.11 and 24.05 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

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[theCapypara]

@Br1ght0ne for hyphen
I'm not really sure who to tag for libreoffice, there is no GitHub user named "raskin"... @7c6f434c is that you? Sorry if not!

[7c6f434c]

Yes, as described in maintainer-list.nix, but maybe I should just make everything uniform… it's not like any plausible future hosting platform is likely to have a name collision for 7c6f434c.

[7c6f434c]

Looks good to me, but I want to see ofBorg builds and also if there are unexpected rev-deps for hyphen

[7c6f434c]

Oh right, to add yourself as a maintainer you should also add yourself to the maintainer-list.nix

[theCapypara]

Oh, alright! Didn't know that existed, first time contributor and all. Will have a look!

[7c6f434c]

Typo revealed by ofBorg eval error

[theCapypara]

Oh wow, whoops.