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).

.gemini/GEMINI.md

@@ -0,0 +1,62 @@
+# ECC for Gemini CLI
+
+This file provides guidance to Gemini CLI when working with code in projects that have ECC installed.
+
+## Overview
+
+Everything Claude Code (ECC) is a production-ready AI coding plugin providing 28 agents, 127 skills, and 60 commands for software development workflows.
+
+## Core Workflows
+
+### Test-Driven Development
+1. Write tests first (RED)
+2. Run tests — they should fail
+3. Write minimal implementation (GREEN)
+4. Run tests — they should pass
+5. Refactor (IMPROVE)
+6. Verify 80%+ coverage
+
+### Code Review
+- Check for security vulnerabilities (OWASP Top 10)
+- Verify error handling at system boundaries
+- Ensure immutable data patterns
+- Validate input at API boundaries
+
+### Architecture
+- Many small files over few large files (200-400 lines, 800 max)
+- Organize by feature/domain, not by type
+- Repository pattern for data access
+- API response format: `{ success, data?, error?, meta? }`
+
+## Coding Standards
+
+- Prefer immutability — create new objects, never mutate
+- Functions under 50 lines
+- No deep nesting (4 levels max)
+- Validate user input with schema validation (Zod, Joi, etc.)
+- No hardcoded secrets — use environment variables
+- Handle errors comprehensively with user-friendly messages
+
+## Security Checklist
+
+Before any commit:
+- No hardcoded secrets
+- All user inputs validated
+- SQL injection prevention (parameterized queries)
+- XSS prevention
+- CSRF protection
+- Authentication/authorization verified
+
+## Commit Format
+
+```
+<type>: <description>
+```
+
+Types: feat, fix, refactor, docs, test, chore, perf, ci
+
+## Available Skills
+
+Skills are located in the `skills/` directory. Each contains a `SKILL.md` with detailed instructions.
+
+Key skills: tdd-workflow, security-review, coding-standards, backend-patterns, frontend-patterns, lead-intelligence, autonomous-agent-harness, deep-research, exa-search, x-api