Add community skills, agents, system prompts from 22+ sources

Community Skills (32):
- jat: jat-start, jat-verify, jat-complete
- pi-mono: codex-cli, codex-5.3-prompting, interactive-shell
- picoclaw: github, weather, tmux, summarize, skill-creator
- dyad: 18 skills (swarm-to-plan, multi-pr-review, fix-issue, lint, etc.)
- dexter: dcf valuation skill

Agents (23):
- pi-mono subagents: scout, planner, reviewer, worker
- toad: 19 agent configs (Claude, Codex, Gemini, Copilot, OpenCode, etc.)

System Prompts (91):
- Anthropic: 15 Claude prompts (opus-4.6, code, cowork, etc.)
- OpenAI: 49 GPT prompts (gpt-5 series, o3, o4-mini, tools)
- Google: 13 Gemini prompts (2.5-pro, 3-pro, workspace, cli)
- xAI: 5 Grok prompts
- Other: 9 misc prompts (Notion, Raycast, Warp, Kagi, etc.)

Hooks (9):
- JAT hooks for session management, signal tracking, activity logging

Prompts (6):
- pi-mono templates for PR review, issue analysis, changelog audit

Sources analyzed: jat, ralph-desktop, toad, pi-mono, cmux, pi-interactive-shell,
craft-agents-oss, dexter, picoclaw, dyad, system_prompts_leaks, Prometheus,
zed, clawdbot, OS-Copilot, and more

agents/community/toad/geminicli.com.toml

@@ -0,0 +1,28 @@
+# Schema defined in agent_schema.py
+# https://github.com/google-gemini/gemini-cli
+identity = "geminicli.com"
+name = "Gemini CLI"
+short_name = "gemini"
+url = "https://geminicli.com/"
+protocol = "acp"
+author_name = "Google"
+author_url = "https://www.gooogle.com"
+publisher_name = "Will McGugan"
+publisher_url = "https://willmcgugan.github.io/"
+type = "coding"
+description = "Query and edit large codebases, generate apps from images or PDFs, and automate complex workflows—all from your terminal."
+tags = []
+run_command."*" = "gemini --experimental-acp"
+
+help = '''
+# Gemini CLI
+
+**Build  debug & deploy with AI**
+
+Query and edit large codebases, generate apps from images or PDFs, and automate complex workflows—all from your terminal.
+
+'''
+
+[actions."*".install]
+command = "npm install -g @google/gemini-cli"
+description = "Install Gemini CLI"