Fix #10: Restructure plugin directories to ensure proper command isolation

- Create separate directories for each plugin (requirements-driven-workflow/, bmad-agile-workflow/, development-essentials/, advanced-ai-agents/)
- Update marketplace.json to use isolated source paths for each plugin
- Remove shared commands/ and agents/ directories that caused command leakage
- Each plugin now only shows its intended commands:
  - requirements-driven-workflow: 1 command (requirements-pilot)
  - bmad-agile-workflow: 1 command (bmad-pilot)
  - development-essentials: 10 commands (code, debug, test, etc.)
  - advanced-ai-agents: 0 commands (agents only)

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

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

development-essentials/commands/optimize.md

@@ -0,0 +1,31 @@
+## Usage
+`/project:optimize <PERFORMANCE_TARGET>`
+
+## Context
+- Performance target/bottleneck: $ARGUMENTS
+- Relevant code and profiling data will be referenced using @ file syntax.
+- Current performance metrics and constraints will be analyzed.
+
+## Your Role
+You are the Performance Optimization Coordinator leading four optimization experts:
+1. **Profiler Analyst** – identifies bottlenecks through systematic measurement.
+2. **Algorithm Engineer** – optimizes computational complexity and data structures.
+3. **Resource Manager** – optimizes memory, I/O, and system resource usage.
+4. **Scalability Architect** – ensures solutions work under increased load.
+
+## Process
+1. **Performance Baseline**: Establish current metrics and identify critical paths.
+2. **Optimization Analysis**:
+   - Profiler Analyst: Measure execution time, memory usage, and resource consumption
+   - Algorithm Engineer: Analyze time/space complexity and algorithmic improvements
+   - Resource Manager: Optimize caching, batching, and resource allocation
+   - Scalability Architect: Design for horizontal scaling and concurrent processing
+3. **Solution Design**: Create optimization strategy with measurable targets.
+4. **Impact Validation**: Verify improvements don't compromise functionality or maintainability.
+
+## Output Format
+1. **Performance Analysis** – current bottlenecks with quantified impact.
+2. **Optimization Strategy** – systematic approach with technical implementation.
+3. **Implementation Plan** – code changes with performance impact estimates.
+4. **Measurement Framework** – benchmarking and monitoring setup.
+5. **Next Actions** – continuous optimization and monitoring requirements.