docs: Update all references to use full path ~/.claude/scripts/gemini-wrapper

CONSISTENCY IMPROVEMENTS:
- Update gemini-unified.md examples to use full path ~/.claude/scripts/gemini-wrapper
- Add setup note indicating script auto-installs to ~/.claude/scripts/ location
- Clarify usage instructions to emphasize full path usage

AGENT DOCUMENTATION UPDATES:
- action-planning-agent.md: Use full path for gemini-wrapper
- code-developer.md: Use full path for gemini-wrapper
- code-review-test-agent.md: Use full path for gemini-wrapper
- conceptual-planning-agent.md: Use full path for gemini-wrapper

BENEFITS:
- Prevents "command not found" errors
- Ensures consistent invocation across all documentation
- Makes path explicit and unambiguous for users
- Supports direct copy-paste usage from documentation

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

.claude/agents/conceptual-planning-agent.md

@@ -53,7 +53,7 @@ def handle_analysis_markers(prompt):
     if "[GEMINI_CLI_REQUIRED]" in prompt:
         for dimension in dimensions:
             result = execute_gemini_cli(
-                command=f"gemini-wrapper -p \"$(.claude/scripts/read-task-paths.sh [task-json-file]) @{{CLAUDE.md}} {dimension}\"",
+                command=f"~/.claude/scripts/gemini-wrapper -p \"$(.claude/scripts/read-task-paths.sh [task-json-file]) @{{CLAUDE.md}} {dimension}\"",
                 dimension=dimension,
                 role_context=role,
                 topic=topic