Add a github workflow for updating language data

[jasonleenaylor]

• Also update the Readme

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This change is 

[github-actions]

Palaso Tests

     4 files  ±0       4 suites  ±0   9m 33s ⏱️ -4s
 4 978 tests ±0   4 744 ✅ ±0  234 💤 ±0  0 ❌ ±0 
16 186 runs  ±0  15 484 ✅ ±0  702 💤 ±0  0 ❌ ±0 

Results for commit f893a6f. ± Comparison against base commit 8cefa89.

♻️ This comment has been updated with latest results.

[jasonleenaylor]

A sample of the resulting PR from executing this action can be viewed here: #1444

[imnasnainaec]

Reviewable status: 0 of 2 files reviewed, 4 unresolved discussions (waiting on @jasonleenaylor)

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.github/workflows/update-language-data.yml line 32 at r3 (raw file):

  update-langtags:
    runs-on: windows-latest
    

Many of the empty lines in this file are space-indented.

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.github/workflows/update-language-data.yml line 74 at r3 (raw file):

        
        # Validate JSON format
        if ! jq empty "langtags.json.new" 2>/dev/null; then

Validating the wrong file here.

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.github/workflows/update-language-data.yml line 152 at r3 (raw file):

          **Files Updated:**
          - langtags.json: ${{ github.event.inputs.update_langtags == 'true' && format('✅ Updated from {0}', steps.langtags.outputs.url) || '⏭️ Skipped' }}
          - ianaSubtagRegistry.txt: ${{ github.event.inputs.update_iana == 'true' && '✅ Updated from https://www.iana.org/assignments/language-subtag-registry/language-subtag-registry' || '⏭️ Skipped' }}

Can you use the IANA_URL env variable here?

[imnasnainaec]

Reviewed all commit messages.
Reviewable status: 0 of 2 files reviewed, 7 unresolved discussions (waiting on @jasonleenaylor)

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.github/workflows/update-language-data.yml line 74 at r3 (raw file):

Previously, imnasnainaec (D. Ror.) wrote…

Validating the wrong file here.

Oh, ianaSubtagRegistry.txt.new isn't even a JSON file, so this step doesn't need the JSON validation (and the final echo of this step will need updating).

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.github/workflows/update-language-data.yml line 9 at r4 (raw file):

    inputs:
      use_staging:
        description: 'Use SLDR staging data for testing'

Mix of single quotes and double quotes in the file.

---

.github/workflows/update-language-data.yml line 84 at r4 (raw file):

      shell: bash
      run: |
        if ! cmp -s "SIL.WritingSystems/Resources/langtags.json" "langtags.json.new"; then

It seems "SIL.WritingSystems/Resources/", "langtags.json", and "ianaSubtagRegistry.txt" could also be added to env, with how often they show up.

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SIL.WritingSystems/Readme.md line 7 at r4 (raw file):

## SIL Locale Data Repository

Much of the writing system data that this library provides comes from the [SIL Locale Data repository (SLDR)](https://github.com/silnrsi/sldr?tab=readme-ov-file#sil-locale-data-repository-sldr)

repository -> Repository
Missing period at end of this sentence.

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SIL.WritingSystems/Readme.md line 22 at r4 (raw file):

This library is used as the final fallback in case of problems with the data served from https://ldml.api.sil.org/langtags.json

To manually update langtags.json to the latest follow the following steps:

Comma between "latest" and "follow".

[imnasnainaec]

Reviewed 1 of 2 files at r7, 2 of 3 files at r8, all commit messages.
Reviewable status: 2 of 3 files reviewed, 6 unresolved discussions (waiting on @jasonleenaylor)

[jasonleenaylor]

Reviewable status: 2 of 3 files reviewed, all discussions resolved (waiting on @imnasnainaec)

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.github/workflows/update-language-data.yml line 74 at r3 (raw file):

Previously, imnasnainaec (D. Ror.) wrote…

Oh, ianaSubtagRegistry.txt.new isn't even a JSON file, so this step doesn't need the JSON validation (and the final echo of this step will need updating).

Done.

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.github/workflows/update-language-data.yml line 84 at r4 (raw file):

Previously, imnasnainaec (D. Ror.) wrote…

It seems "SIL.WritingSystems/Resources/", "langtags.json", and "ianaSubtagRegistry.txt" could also be added to env, with how often they show up.

We can leave that for a future enhancement I think.

[tombogle]

Reviewed 1 of 3 files at r8, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @imnasnainaec)

[imnasnainaec]

Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @jasonleenaylor)