feat: base api-client impl

[IMB11]

• Base structure of the package
• Move projects v2/v3 stuff from utils to package as an example
• Create DI provider for the nuxt client singleton
• Modify projects pages (app + web) to use new package.

[IMB11]

We will figure out publishing at a later date.

[Prospector]

overall, quite cool but quite concerned that the tauri implementation is not doing what we want

[Copilot]

Pull Request Overview

This PR implements a new @modrinth/api-client package to provide a flexible, type-safe API client for Modrinth's APIs (Labrinth, Kyros, and Archon). The implementation supports multiple platforms (Node.js, browsers, Nuxt, Tauri) with a composable feature system for authentication, retries, circuit breaking, and logging.

Key changes:

• New modular API client package with platform-specific implementations
• Feature system for composable request/response processing (auth, retry, circuit breaker, verbose logging)
• Migration of projects v2/v3 functionality from utils package to new client modules
• Frontend app updated to use new DI-based client singleton

Reviewed Changes

Copilot reviewed 41 out of 45 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
packages/api-client/*	New package with core client, features, modules, and platform implementations
packages/utils/api/*	Removed old API implementation now replaced by api-client package
packages/ui/src/providers/api.ts	Removed old API provider in favor of new client
apps/frontend/src/providers/api-client.ts	New DI provider for Nuxt client singleton
apps/frontend/src/app.vue	Updated to use new client provider
apps/frontend/src/error.vue	Updated to provide client in error page
apps/frontend/src/pages/[type]/[id]/settings/*.vue	Updated to use new client API
pnpm-lock.yaml	Added api-client dependencies

Files not reviewed (1)

• pnpm-lock.yaml: Language not supported

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[Prospector]

approved, but only use for archon and kyros for now. Labrinth stuff needs more cooking/maybe a different solution