feat: enhance guest network configuration for NixOS support and updat…

fix: update subnet mask from /24 to /16 in DHCP configuration

feat: add cp command for file transfer to/from Firecracker MicroVM and refactor exec command

feat: add exec command for Firecracker MicroVM and update dependencies

refactor: enhance Tailscale setup for Alpine compatibility and streamline service management

feat: integrate Tailscale support for Firecracker MicroVMs

feat: add colored_json dependency and update inspect command output formatting

feat: add inspect command to view Firecracker MicroVM details and upd…

feat: update kernel handling in microvm and downloader services

feat: add SSH key change detection and image regeneration for rootfs preparations

feat: add SSH key management for Firecracker MicroVMs

feat: add 'rm' command for deleting Firecracker MicroVMs

feat: add HTTP API for MicroVM management

- Created `fire-client` crate with dependencies on `anyhow` and `reqwest`.
- Created `fire-server` crate with dependencies on `actix-web`, `utoipa`, and others for API documentation and handling.
- Implemented MicroVM API endpoints in `fire-server` for creating, deleting, retrieving, listing, starting, and stopping MicroVMs.
- Added SSH keys support in `fire-config` for MicroVM configuration.
- Integrated `fire-server` into the main application with a new `serve` command.
- Updated `firecracker-up` to include `fire-client` and `fire-server` dependencies and added command-line options for SSH keys.

feat: add vmlinuz extraction functionality and update prepare function to accept kernel file

fix: update virtual machine status formatting and add updated timestamp in database

feat: add overlay initialization script for boot process