Add multi-agent hook support and revamp CLI TUI with clack/prompts

[f1shy-dev]

This PR expands AI coding agent hook support from 2 to 5 agents and modernizes the CLI UI framework.

New agent setup modules

• Add packages/server/src/setup/gemini.ts—configures ~/.gemini/settings.json hooks, transforms BeforeAgent/BeforeTool/SessionStart/SessionEnd/AfterAgent events via inline Node.js script to normalized names
• Add packages/server/src/setup/cursor.ts—configures ~/.cursor/hooks.json with sessionStart/preToolUse (matcher: "*")/stop hooks, transforms event names inline before POST
• Add packages/server/src/setup/cline.ts—creates executable Node scripts in ~/Documents/Cline/Rules/Hooks/ for TaskStart/UserPromptSubmit/PreToolUse/TaskComplete, uses marker comment // @distracted/server hook for detection/removal, awaits Promise.allSettled for multi-event POST

Setup orchestration and CLI

• Update packages/server/src/setup/index.ts—add gemini/cursor/cline to AgentType and SetupStatus, replace raw readline keypress multi-select with @clack/prompts.multiselect, update getSetupStatus/setupAgent/removeAgent interactiveSetup/interactiveRemove for all 5 agents
• Rewrite packages/server/src/bin.ts—remove cac dependency, implement manual process.argv parsing for --setup/--remove/--status/--port/--help, add clack intro/outro/confirm/log flow, support comma-separated agent lists

Types and server

• Update packages/server/src/types.ts—extend HookPayload.source union to include "claude" | "opencode" | "gemini" | "cursor" | "cline" | "pi"
• Update packages/server/src/server.ts—validate source against expanded list, replace startServer banner with p.note/p.log.info, use picocolors for status output
• Update packages/server/src/state.ts—replace UI.Style.* and UI.println with @clack/prompts (p.log.step for hook events, p.log.info for status updates), use picocolors for colored output

Existing setup and dependencies

• Update packages/server/src/setup/claude.ts and opencode.ts—replace UI.println/UI.Style usage with p.log.success/p.log.info and picocolors dim
• Update packages/server/package.json—add @clack/prompts and picocolors, remove cac

[capy-ai]

LGTM