feat: add French language support

[PrinceSpecial]

Description

Adds French as a fully supported language in Inji Wallet.

Changes

• locales/fr.json (new): complete French translation, structurally identical to en.json — same keys, same {{interpolation}} placeholders, same arrays. Verified 1:1 key parity with en.json (806 keys, none missing/extra).
• i18n.ts:
• import fr from './locales/fr.json'
• added fr to the i18next resources map
• added fr: 'Français' to SUPPORTED_LANGUAGES

How it works
The language picker (LanguageSelector) and the setup screen are driven by SUPPORTED_LANGUAGES, so French appears automatically. The three-letter code mapping for server-localized fields uses the iso-639-3 package (fr → fra) and needs no change. French is LTR, so no I18nManager/RTL changes are required. No new dependencies.

Testing

• Automated key-parity check: fr.json matches the 806 keys of en.json.
• Ran a debug build on a physical Android device (Galaxy S10+), selected Français on the language screen and confirmed the whole UI renders in French (home, onboarding tooltips, banners, bottom navigation, etc.).

Issue ticket number and link

Closes #2532

Screenshots

Summary by CodeRabbit

• New Features
  • Added French as a supported app language.
  • Added comprehensive French translations across navigation, authentication, identity management, settings, help content, error messages, and onboarding flows.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro

Run ID: 43c951fc-dfc4-4a09-9c13-46c9261e7e10

📥 Commits

Reviewing files that changed from the base of the PR and between 5840a6e and 252fd00.

📒 Files selected for processing (2)

• i18n.ts
• locales/fr.json

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Walkthrough

French is registered as a supported i18next locale, with a complete locales/fr.json translation covering wallet navigation, authentication, credential exchange, backup, setup, and trust-related screens.

Changes

French localization

Layer / File(s)	Summary
Register French locale i18n.ts	Adds French resources and exposes fr: 'Français' through SUPPORTED_LANGUAGES.
Translate core wallet UI locales/fr.json	Adds French strings for activity logs, identity details, authentication, navigation, issuer onboarding, help content, and credential modals.
Translate sharing and setup flows locales/fr.json	Adds French strings for login, credential sharing, verification, backup and restore, setup, web authentication, transaction codes, and trust screens.

Estimated code review effort: 2 (Simple) | ~10 minutes

Possibly related PRs

• inji/inji-wallet#2491: Modifies the locale registration and supported-language configuration in i18n.ts.

Poem

French words bloom where wallet screens glow,
Credentials travel, ready to go.
“Français” joins the language parade,
Every prompt in a new shade.
Bonjour, secure identity flow!

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly states the main change: adding French language support.
Description check	✅ Passed	The description includes the required sections and enough detail about changes, issue reference, and screenshots.
Linked Issues check	✅ Passed	The changes match #2532 by adding fr.json and registering French in i18n and supported languages.
Out of Scope Changes check	✅ Passed	No unrelated code changes are indicated beyond the French localization feature.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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