feat: build orbit api studio frontend

[mx369]

Motivation

• Provide a Postman-like API debugging workspace for desktop/web with a modern, responsive UI built in React + TypeScript.
• Deliver core flows (request building, execution, response inspection, environments, history, import/export, and lightweight scripting) with maintainable modular code.

Description

• Scaffolds a Vite + React + TypeScript project with Tailwind-based styling, theme toggle, and a small UI component library under src/components/ui and global CSS tokens in src/index.css.
• Implements a three-column layout (Collections/History sidebar, Request workspace, Response panel) plus a command palette and multi-tab request model in src/components/* and state management with zustand in src/store.
• Adds request construction, variable/template resolution, auth handling, body types (form-data, x-www-form-urlencoded, raw), and request execution via fetch with AbortController in src/utils/request.ts and snippet generation in src/utils/snippets.ts.
• Adds a safe-ish sandbox for pre-request and test scripts with timeouts and a small pm API, IndexedDB/localStorage persistence and import/export helpers in src/utils/storage.ts, and utilities for variable scoping and ID generation.

Testing

• No automated tests were executed in this environment due to offline/limited run capabilities.
• The repository includes a README.md with pnpm install && pnpm dev run instructions for local verification by running the dev server.

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Codex Task