chore: upgrade all dependencies to latest major + minor

[tajo]

Upgrades every workspace dependency (deps + devDeps) to its latest major+minor and makes the whole monorepo green again. Rebased on top of #636 (Vite 8 follow-up).

Highlights

• Library (@ladle/react): Babel 7→8, Koa types 2→3, commander 12→15, globby 14→16, chokidar 4→5, open 10→11, react-hotkeys-hook 4→5, react-inspector 6→9, vitest 2→4, @types/node 22→26, msw, vite 8.0→8.1.
• Tooling: ESLint 9→10, TypeScript 5.7→6, commitlint 19→21, lint-staged 15→17, globals 15→17, turbo, prettier, changesets, pnpm 9→11 (packageManager).
• e2e: Tailwind 3→4, baseui 14→18, cross-env 7→10, Playwright 1.49→1.61.
• Website: Docusaurus 3.6→3.10, React 18→19, algolia client 5.18→5.55.

Code changes required by the majors

• Babel 8 — @babel/types is named-exports only (import * as t); removed parser plugins that are now default and the dropped decoratorsBeforeExport option; replaced a t.identifier() hack (Babel 8 validates identifier names) with a computed memberExpression; refreshed one snapshot (generator now emits UTF-8 instead of \xE9 escapes).
• TypeScript 6 — added css.d.ts ambient module (TS6 reports unresolved side-effect CSS imports, TS2882).
• ESLint 10 — pinned react.version (eslint-plugin-react's "detect" path still calls the removed getFilename()); fixed 4 real no-useless-assignment findings (newly in recommended).
• Tailwind 4 — migrated e2e/css to @tailwindcss/postcss + @import "tailwindcss"/@source, removed the dead v3 JS config.
• pnpm 11 — moved peerDependencyRules from the dead pnpm package.json field to pnpm-workspace.yaml; added a @mdx-js/react override so Docusaurus doesn't end up with two copies (which breaks the website SSG build).

Verification

• Build 14/14 (forced) · tsc clean · lint clean
• 56 unit tests · full e2e suite 16/16 turbo tasks (addons/baseui 18/msw/tailwind 4, dev + prod)

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