feat(modrinth): add Modrinth SDK package

[JVictorV]

Adds a new @distilled.cloud/modrinth SDK generated from the Modrinth OpenAPI spec, plus the CI/release wiring needed to build, test, and publish it alongside the other workspace packages.

• New packages/modrinth/ package with full operation coverage (projects, versions, users, teams, threads, notifications, reports, payouts, search, tags), typed errors, and per-operation tests
• Spec stored in-tree at packages/modrinth/specs/openapi.yaml with two JSON Patch files for missing error responses and mutation 400 handling
• .github/workflows/test.yml: detects changes under packages/modrinth/** and runs a new ci-modrinth job (build core, check, test)
• .github/workflows/pr-package.yml: registers modrinth in the package matrix and paths-filter
• .github/workflows/release.yml: includes packages/modrinth/package.json in the release file list
• .github/workflows/nuke.yml: adds a modrinth toggle
• bun.lock: registers the new workspace

import { Modrinth } from "@distilled.cloud/modrinth"

const project = yield* Modrinth.getProject({ idOrSlug: "fabric-api" })