feat: add lead-intelligence skill, autonomous-agent-harness, and Gemini CLI target

New skills:
- lead-intelligence: AI-native lead intelligence pipeline with 4 agents
  (signal-scorer, mutual-mapper, enrichment-agent, outreach-drafter).
  Replaces Apollo/Clay with agent-powered signal scoring, mutual ranking,
  warm path discovery, and personalized outreach drafting.
- autonomous-agent-harness: Replaces standalone agent frameworks (Hermes,
  AutoGPT) using Claude Code native crons, dispatch, memory, and computer
  use. Documents the full architecture for persistent autonomous operation.

New CLI target:
- Gemini CLI: .gemini/GEMINI.md config added, gemini target registered
  in install-modules.json platform-configs module.

Updated:
- marketplace.json: Fixed stale counts (was "14+ agents, 56+ skills"),
  now accurately reflects 30 agents, 138 skills, 60 commands.
- README.md and AGENTS.md: Synced skill counts to 138.
- install-modules.json: Added lead-intelligence to business-content
  module, autonomous-agent-harness to agentic-patterns module.

All catalog validations pass (30/60/138). Install-manifest tests pass (20/20).

manifests/install-modules.json

@@ -84,6 +84,7 @@
         ".claude-plugin",
         ".codex",
         ".cursor",
+        ".gemini",
         ".opencode",
         "mcp-configs",
         "scripts/setup-package-manager.js"
@@ -93,6 +94,7 @@
         "cursor",
         "antigravity",
         "codex",
+        "gemini",
         "opencode"
       ],
       "dependencies": [],
@@ -273,6 +275,7 @@
         "skills/content-engine",
         "skills/investor-materials",
         "skills/investor-outreach",
+        "skills/lead-intelligence",
         "skills/market-research"
       ],
       "targets": [
@@ -394,6 +397,7 @@
       "paths": [
         "skills/agent-harness-construction",
         "skills/agentic-engineering",
+        "skills/autonomous-agent-harness",
         "skills/ai-first-engineering",
         "skills/autonomous-loops",
         "skills/blueprint",