feat(install/unix): add spicetify to session PATH (spicetify#2785)

install.sh

@@ -114,7 +114,7 @@ check() {
                 echo >> "$shellrc"
             fi
             echo "${2:-$path}" >> "$shellrc"
-            log "Restart your shell to have spicetify in your PATH."
+            export PATH="$spicetify_install:$PATH"
         else
             log "spicetify path already set in $shellrc, continuing..."
         fi
@@ -144,4 +144,4 @@ if [ "$choice" = "N" ] || [ "$choice" = "n" ]; then
     exit 0
 fi
 echo "Starting the spicetify Marketplace installation script.."
-curl -fsSL "https://raw.githubusercontent.com/spicetify/spicetify-marketplace/main/resources/install.sh" | sh
+curl -fsSL "https://raw.githubusercontent.com/spicetify/spicetify-marketplace/main/resources/install.sh" | sh