Add Configuration Management and CLI Tools

[AnshSinghSonkhia]

Priority: Low
Category: Usability
Estimated Effort: Small

Description

Improve usability with configuration management and CLI tools:

• YAML/JSON configuration files
• Command-line interface
• Environment variable support
• Configuration validation

Implementation Plan

1. Configuration System (config/)

   • YAML configuration file support
   • Environment variable override
   • Configuration validation
   • Hot-reload capability

2. CLI Application (cmd/)

   • Cobra-based CLI framework
   • Commands for file operations
   • Peer management commands
   • Status and diagnostic tools

3. Management Commands

   govaultfs start --config config.yaml
   govaultfs upload file.txt
   govaultfs download <hash>
   govaultfs peers list
   govaultfs status

4. Configuration Schema

   server:
     listen_addr: ":8080"
     storage_root: "./data"
   network:
     bootstrap_nodes: ["node1:8080", "node2:8080"]
     max_peers: 50
   security:
     encryption_key: "auto"

Files to Create/Modify:

• config/ - Configuration management
• cmd/ - CLI commands
• main.go - CLI integration
• config.yaml - Default configuration