Add Weblate integration for translation downloads

[Copilot]

Implements Weblate API integration to enable downloading translations for Android string resources.

Changes

Download Scripts

• download-translations.py - Fetches translations via Weblate API with language code conversion (pt-br → pt-rBR)
• download-translations.sh - Bash alternative with same functionality
• Both support custom Weblate hosts and project configurations

Configuration & Automation

• .weblate - Project configuration for Weblate component setup
• .github/workflows/update-translations.yml - Weekly automated downloads with PR creation

Documentation

• WEBLATE.md - Setup guide covering API authentication, project configuration, troubleshooting
• QUICKSTART.md - Essential commands and common workflows
• Updated README.md with translation section

Example Structure

• Added values-es/ and values-fr/ directories with placeholder strings.xml files

Usage

export WEBLATE_TOKEN='your-api-token'
python3 download-translations.py

For custom configurations:

python3 download-translations.py \
  --host https://your-weblate.org \
  --project your-project \
  --component android-strings

Notes

• Language code conversion handles both uppercase and lowercase variants (pt-BR, pt-br both → pt-rBR)
• Complex language codes (zh-Hans-CN) preserved as-is with warning
• Scripts gracefully handle missing API tokens and non-existent translation files

Original prompt

Create a downloaded version on weblate.org/?momtiai

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