feat(i18n): right-to-left (RTL) language support in the editor

[JarbasAl]

Adds right-to-left support so languages like Persian (fa-IR, data already present) render and edit correctly.

One change, 4 files:

• ovos_localize/lang_utils.py — is_rtl(code), single source of truth for direction, keyed on the BCP-47 primary subtag (never inferred from script, so Kabyle/Tifinagh stay LTR).
• index.html — mirrored RTL_LANGS/isRtlLang(); translation textarea gets dir=rtl for RTL langs, JSON fields dir=auto; slot placeholders wrapped in <bdi> so Latin slot names don't scramble RTL text.
• test/unittests/test_lang_utils.py — RTL/LTR table (incl. kab-is-LTR guard).
• docs/local-development.md — RTL note + manual-QA caveat.

Local: full suite pytest test/ → 194 passed; node --check on the SPA script → OK; is_rtl/isRtlLang parity verified.

Bidi visual correctness (caret, punctuation order) isn't CI-verifiable — needs a manual fa-IR browser pass.

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Review details

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 415294f7-8896-4b6e-95ba-d36a297b61c2

📥 Commits

Reviewing files that changed from the base of the PR and between 5dc8e63 and 2cc29be.

📒 Files selected for processing (4)

• docs/local-development.md
• index.html
• ovos_localize/lang_utils.py
• test/unittests/test_lang_utils.py

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feat/rtl-support

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