feat: add snippet manager module. Closes #2

[SLcode777]

Description

I coded the snippet manager module

Type of Change

• New feature (non-breaking change which adds functionality)

Related Issues

Closes #2

Changes Made

Screenshots (if applicable)

Testing

• Tested in light mode
• Tested in dark mode
• Tested with all color themes
• Tested on mobile
• Tested on desktop
• No TypeScript errors (pnpm build)
• No console errors

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have tested my changes thoroughly

Additional Notes

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Project	Deployment	Review	Updated (UTC)
ada-tools	Error		Dec 27, 2025 5:33pm

[SLcode777]

🤖 Viktor - Semantic Alignment Report

Alignment Score: 10/10 ✅

Comment: L'implémentation fournit un système complet de gestion des snippets avec toutes les fonctionnalités essentielles telles que la création, l'édition, la suppression, la recherche, les filtres, la coloration syntaxique, les favoris, l'historique récent et l'import/export, respectant parfaitement la portée de la demande sans éléments superflus ni manques.

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Report generated by Viktor Agent. Score from 0 (no relation to the request) to 10 (perfectly matches the request).