feat: reword phase to epic, update mkdocs

docs/content/stories/epic3/3.4-module-cli.md

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+# Story 3.4: Module Management CLI Tool
+
+## Metadata
+- **Story ID**: 3.4
+- **Title**: Module Management CLI Tool
+- **Epic**: 3 - Module Framework
+- **Status**: Pending
+- **Priority**: Medium
+- **Estimated Time**: 4-5 hours
+- **Dependencies**: 3.1, 3.3
+
+## Goal
+Provide CLI tooling for managing modules, validating dependencies, and testing module loading.
+
+## Description
+This story creates a CLI tool that allows developers and operators to manage modules, validate dependencies, test module loading, and inspect module information.
+
+## Deliverables
+
+### 1. CLI Tool (`cmd/platformctl/main.go`)
+- `platformctl modules list` - List all loaded modules with versions
+- `platformctl modules validate` - Validate module dependencies
+- `platformctl modules test <module>` - Test module loading
+- `platformctl modules info <module>` - Show module details
+- `platformctl modules dependencies <module>` - Show module dependencies
+- Command-line argument parsing
+- Error handling and user-friendly output
+
+### 2. Makefile Integration
+- `make install-cli` - Install CLI tool
+- `make cli` - Build CLI tool
+- `make cli-test` - Test CLI tool
+
+## Implementation Steps
+
+1. **Create CLI Tool**
+   - Create `cmd/platformctl/main.go`
+   - Use cobra for CLI framework
+   - Implement commands
+
+2. **Implement Commands**
+   - List command
+   - Validate command
+   - Test command
+   - Info command
+
+3. **Add to Makefile**
+   - Add build commands
+   - Add install commands
+
+## Acceptance Criteria
+- [ ] CLI tool lists all modules
+- [ ] Dependency validation works
+- [ ] Module testing works
+- [ ] CLI is installable and usable
+- [ ] Commands provide helpful output
+- [ ] Error messages are clear
+
+## Files to Create/Modify
+- `cmd/platformctl/main.go` - CLI tool
+- `Makefile` - Add CLI commands
+