docs: fix minor style bug and improve style for workflow

Adds 'hs explore' command that queries the Hyperstack cloud API to
discover available stacks and introspect their schemas. Supports three
levels of detail: list all stacks, show entities/views for a stack, or
show fields/types for a specific entity. Includes --json flag for
machine-readable output used by AI coding agents.

New API client methods for public registry endpoints (no auth required)
and authenticated schema endpoints for user-owned stacks.

…nd tutorial

New 'Build with AI' docs section covering:
- Agent skills overview and one-command install (npx skills add)
- Editor setup for Cursor, Claude Code, OpenCode, Windsurf, VS Code, Cline
- Schema discovery with hs explore
- Prompt cookbook with 8 ORE-focused copy-paste prompts
- Finding IDLs guide for building custom stacks
- Zero-code agentic tutorial for building an ORE mining dashboard

Also updates homepage with Build with AI cards, adds hs explore to CLI
reference, adds skills callout to quickstart, and configures llms.txt
with project description and promoted pages.

…first

Adds docs/public/agent.md served at /agent.md, a plain text instruction
file that any AI agent can read to self-setup Hyperstack (install CLI
via Cargo/npm, install skills for 40+ editors via npx skills, discover
stacks). Users paste one prompt to get everything working.

Restructures the overview page to lead with the agent-driven setup path
and moves manual instructions to a secondary section. Adds tip callout
to the editor setup page pointing to the automated path.

- Add CopyPrompt component for copy-to-clipboard prompt boxes
- Move finding-idls.mdx from agent-skills to building-stacks
- Update agent-skills prompts to use CopyPrompt and be more concise
- Simplify editor setup with explicit --agent flags and unified .agents/skills/ paths
- Add heatmap grid prompt to cookbook

Agentic

chore: release main