zshrc: feat: Add OS determination

.zshrc

@@ -7,6 +7,41 @@ if [[ -r "${XDG_CACHE_HOME:-$HOME/.cache}/p10k-instant-prompt-${(%):-%n}.zsh" ]]
 fi
 
 
+########## Personal - Determine OS and Set Variables ##########################
+if [[ "$OSTYPE" == "linux-gnu"* ]]; then
+    # Linux
+    OSNAME=Linux
+
+    if [ -f /etc/os-release ]; then
+        . /etc/os-release
+        DISTRO=$NAME
+        VER=$VERSION_ID
+    elif type lsb_release >/dev/null 2>&1; then
+        DISTRO=$(lsb_release -si)
+        VER=$(lsb_release -sr)
+    elif [ -f /etc/lsb-release ]; then
+        . /etc/lsb-release
+        DISTRO=$DISTRIB_ID
+        VER=$DISTRIB_RELEASE
+    elif [ -f /etc/debian_version ]; then
+        DISTRO=Debian
+        VER=$(cat /etc/debian_version)
+    else
+        # Fall back to uname
+        DISTRO=$(uname -s)
+        VER=$(uname -r)
+    fi
+elif [[ "$OSTYPE" == "darwin"* ]]; then
+    # macOS
+    OSNAME=macOS
+    VER=$(sw_vers | grep ProductVersion | cut -c 17-)
+else
+    # Fall back to uname
+    OSNAME=$(uname -s)
+    VER=$(uname -r)
+fi
+
+
 ########## Zinit ##############################################################
 ### Added by Zinit's installerW
 if [[ ! -f $HOME/.local/share/zinit/zinit.git/zinit.zsh ]]; then