🔧 feat(fish): Set env vars for machine info

Added $OS & $HOST global variables.

.config/fish/conf.d/00-init.fish

@@ -9,6 +9,15 @@ set -Ux XDG_CACHE_HOME "$HOME/.cache"
 set -Ux XDG_DATA_HOME "$HOME/.local/share"
 set -Ux XDG_STATE_HOME "$HOME/.local/state"
 
+# Machine info.
+set -gx OS "$(uname)"
+
+if command -v hostnamectl &>/dev/null
+    set -gx HOST "$(hostnamectl --static)"
+else if command -v scutil &>/dev/null # macOS
+    set -gx HOST "$(scutil --get ComputerName)"
+end
+
 # Projects dir.
 set -gx HACK "$HOME/hackin"