docs: add French README (README.fr.md)

[edouard-claude]

📝 Description

• Add complete French (fr) translation of the README as README.fr.md (881 lines)
• Update language navigation links in README.md, README.zh.md, README.ja.md, and README.pt-br.md to include [Français](README.fr.md)

Translation Coverage

All sections from the English README are fully translated:

• Features, installation, Docker Compose, Quick Start
• Chat app integrations (Telegram, Discord, QQ, DingTalk, LINE)
• Configuration, Security Sandbox, Heartbeat, Providers
• CLI Reference, Troubleshooting, API Key Comparison

Navigation Link Matrix (after merge)

README	中文	日本語	Português	Français	English
README.md	✅	✅	✅	✅	bold
README.zh.md	bold	✅	✅	✅	✅
README.ja.md	✅	bold	✅	✅	✅
README.pt-br.md	✅	✅	bold	✅	✅
README.fr.md	✅	✅	✅	bold	✅

Notes

• Follows the same pattern as docs: add Brazilian Portuguese README (README.pt-br.md) #385 (Brazilian Portuguese)
• Translation faithfully reproduces the source README including the glm-4.7 model reference in Quick Start (matches upstream)
• Proper French accents and typography used throughout (é, è, ê, à, ç, etc.)

🗣️ Type of Change

• 🐞 Bug fix (non-breaking change which fixes an issue)
• ✨ New feature (non-breaking change which adds functionality)
• 📖 Documentation update
• ⚡ Code refactoring (no functional changes, no api changes)

🤖 AI Code Generation

• 🤖 Fully AI-generated (100% AI, 0% Human)
• 🛠️ Mostly AI-generated (AI draft, Human verified/modified)
• 👨‍💻 Mostly Human-written (Human lead, AI assisted or none)

🔗 Related Issue

N/A — New translation contribution

📚 Technical Context (Skip for Docs)

N/A

🧪 Test Environment

N/A — Documentation only

☑️ Checklist

• My code/docs follow the style of this project.
• I have performed a self-review of my own changes.
• I have updated the documentation accordingly.

[huaaudio]

Hi @edouard-claude , thanks for the contribution!

[Orgmar]

@edouard-claude Merci pour cette traduction complète du README en français ! Le fait d'avoir mis à jour les liens dans toutes les autres versions linguistiques montre un vrai souci du détail.

On a le PicoClaw Dev Group sur Discord pour que les contributeurs puissent échanger et collaborer. Si ça t'intéresse, envoie un email à [email protected] avec le sujet [Join PicoClaw Dev Group] edouard-claude et on t'enverra le lien d'invitation !