feat: Create minimal Zero-OS initramfs with console support

- Fixed build system to clone source repositories instead of downloading binaries
- Enhanced scripts/fetch-github.sh with proper git repo cloning and branch handling
- Updated scripts/compile-components.sh for RFS compilation with build-binary feature
- Added minimal firmware installation for essential network drivers (73 modules)
- Created comprehensive zinit configuration set (15 config files including getty)
- Added util-linux package for getty/agetty console support
- Optimized package selection for minimal 27MB initramfs footprint
- Successfully builds bootable vmlinuz.efi with embedded initramfs
- Confirmed working: VM boot, console login, network drivers, zinit init system

Components:
- initramfs.cpio.xz: 27MB compressed minimal Zero-OS image
- vmlinuz.efi: 35MB bootable kernel with embedded initramfs
- Complete Zero-OS toolchain: zinit, rfs, mycelium compiled from source

components/rfs/frontend/README.md

@@ -29,40 +29,7 @@
 
 ### backend
 
-In fl-server dir:
-
-- create flists dir containaing dirs for each user
-  ex:
-  - fl-server
-    - flists
-      - user1
-      - user2
-- include config file
-  ex:
-
-  ```yml
-      host='localhost'
-      port=4000
-      store_url=['dir:///tmp/store0']
-      flist_dir='flists'
-
-      jwt_secret='secret'
-      jwt_expire_hours=5
-
-      [[users]] # list of authorized user in the server
-      username = "user1"
-      password = "password1"
-
-      [[users]]
-      username = "user2"
-      password = "password2"
-  ```
-
-- Move to `fl-server` directory and execute the following command to run the backend:
-
-  ```bash
-  cargo run --bin fl-server -- --config-path config.toml
-  ```
+Please check [rfs server](../rfs/README.md#server-command)
 
 ### frontend