[Feature] Add support for AlmaLinux

# 安装 rsync 也不支持
[root@localhost /]# bash -c "$INIT_SCRIPT"
=== Rsync Installation Script ===
Detected system: almalinux 9.7
Installing rsync...
Unsupported system: almalinux

# 安装 FFmpeg 也不支持
[root@localhost /]# bash -c "$INIT_SCRIPT"
Detected system: almalinux 9.7, start to install FFmpeg...
Unsupported system: almalinux 9.7

# 安装 Pure-FTPd 也不支持

# 安装 Supervisor
[root@localhost /]# bash -c "$INIT_SCRIPT"
Detected system: almalinux 9.7
Unsupported system

[root@localhost ~]# cat /etc/os-release 
NAME="AlmaLinux"
VERSION="9.7 (Moss Jungle Cat)"
ID="almalinux"
ID_LIKE="rhel centos fedora"
VERSION_ID="9.7"
PLATFORM_ID="platform:el9"
PRETTY_NAME="AlmaLinux 9.7 (Moss Jungle Cat)"
ANSI_COLOR="0;34"
LOGO="fedora-logo-icon"
CPE_NAME="cpe:/o:almalinux:almalinux:9::baseos"
HOME_URL="https://almalinux.org/"
DOCUMENTATION_URL="https://wiki.almalinux.org/"
BUG_REPORT_URL="https://bugs.almalinux.org/"

ALMALINUX_MANTISBT_PROJECT="AlmaLinux-9"
ALMALINUX_MANTISBT_PROJECT_VERSION="9.7"
REDHAT_SUPPORT_PRODUCT="AlmaLinux"
REDHAT_SUPPORT_PRODUCT_VERSION="9.7"
SUPPORT_END=2032-06-01