feat(locale): add additional metadata properties

[matthewmayer]

fix #2012

• Tried to make locale titles more consistent, so if a country is specified it's always in parentheses. Also favour Slovak and Nepali over Slovakian and Nepalese.
• only put minimal data for base locale
• this probably needs more tests, but not sure exactly what best to test

[matthewmayer]

i might need some assistance with the "Make MetadataDefinitions optional and Partial" part, wasn't sure how to do that.

[codecov]

Codecov Report

Merging #2025 (d4123b0) into next (ed19bef) will decrease coverage by 0.03%.
The diff coverage is 89.16%.

❗ Current head d4123b0 differs from pull request most recent head 1cfdee2. Consider uploading reports for the commit 1cfdee2 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             next    #2025      +/-   ##
==========================================
- Coverage   99.61%   99.59%   -0.03%     
==========================================
  Files        2538     2563      +25     
  Lines      242253   243670    +1417     
  Branches     1299     1278      -21     
==========================================
+ Hits       241319   242672    +1353     
- Misses        907      971      +64     
  Partials       27       27              

Impacted Files	Coverage Δ
src/definitions/definitions.ts	0.00% <0.00%> (ø)
src/definitions/metadata.ts	0.00% <0.00%> (ø)
src/locales/af_ZA/metadata.ts	100.00% <100.00%> (ø)
src/locales/ar/metadata.ts	100.00% <100.00%> (ø)
src/locales/az/metadata.ts	100.00% <100.00%> (ø)
src/locales/base/metadata.ts	100.00% <100.00%> (ø)
src/locales/cs_CZ/metadata.ts	100.00% <100.00%> (ø)
src/locales/de/metadata.ts	100.00% <100.00%> (ø)
src/locales/de_AT/metadata.ts	100.00% <100.00%> (ø)
src/locales/de_CH/metadata.ts	100.00% <100.00%> (ø)
... and 55 more

... and 361 files with indirect coverage changes

[ST-DDT]

Here the suggested metadata definition type changes as requested: matthewmayer#1

[matthewmayer]

i might need some assistance with the "Make MetadataDefinitions optional and Partial" part, wasn't sure how to do that.

thanks for the help on this!

[ST-DDT]

Thanks for filling in these metadata. The PR looks good to me.

I will have another look at the endonyms tomorrow just to be sure nothing slipped my checks.

[Shinigami92]

all in all looks good to me
still just some questions and suggestions