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/code-developer.md

@@ -56,7 +56,7 @@ ELIF context insufficient OR task has analysis marker:
   - **Purpose**: Enables autonomous development with intelligent file discovery and code generation
 
 **Analysis CLI Usage Standards**:
-- **Gemini CLI**: Use task-specific paths from JSON: `gemini-wrapper -p "$(~/.claude/scripts/read-task-paths.sh [task-json-file]) [prompt]" `
+- **Gemini CLI**: Use task-specific paths from JSON: `~/.claude/scripts/gemini-wrapper -p "$(~/.claude/scripts/read-task-paths.sh [task-json-file]) [prompt]" `
 - **Codex CLI**: Use task-specific paths from JSON: `codex --full-auto exec "$(~/.claude/scripts/read-task-paths.sh [task-json-file]) [prompt]"`
 - **Follow Guidelines**: @~/.claude/workflows/gemini-unified.md and @~/.claude/workflows/codex-unified.md