genfile 0.6.0

CLI for genfile_core template archive management - create, manage, and materialize code generation templates.
Documentation
# Feature: Archive Serialization

### Scope

- **Purpose**: Provides the `.pack` command to create fully portable, self-contained archive files.
- **Responsibility**: Documents the pack operation: internalizing references and writing to file.
- **In Scope**: Packing from an existing archive or directory, JSON/YAML output, portability verification.
- **Out of Scope**: Archive loading/saving without internalization (→ 001), materialization (→ 006).

### Design

The pack command internalizes all external content references (file refs, URL refs) into the archive before saving. Input can be an existing archive file or a directory (which is first scanned as a new archive). Output format is auto-detected from the file extension or specified explicitly. The result is a single portable file containing all templates, parameters, values, and metadata with no external dependencies.

### Features

| File | Relationship |
|------|--------------|
| [`feature/005_content_source_management.md`]005_content_source_management.md | Content internalization prerequisite for the pack operation |

### Sources

| File | Relationship |
|------|--------------|
| [`src/handlers/pack.rs`]../../src/handlers/pack.rs | Handler implementation for `.pack` command |

### Tests

| File | Relationship |
|------|--------------|
| [`tests/archive_commands_test.rs`]../../tests/archive_commands_test.rs | Integration tests covering pack command |