add apply cli command

cmd/apply.go

@@ -1,14 +1,40 @@
 package cmd
 
 import (
+	"github.com/satisfactorymodding/ficsit-cli/cli"
 	"github.com/spf13/cobra"
 )
 
 var applyCmd = &cobra.Command{
-	Use:   "apply",
+	Use:   "apply [installation] ...",
 	Short: "Apply profiles to all installations",
 	RunE: func(cmd *cobra.Command, args []string) error {
-		// TODO
+		global, err := cli.InitCLI()
+		if err != nil {
+			return err
+		}
+
+		for _, installation := range global.Installations.Installations {
+			if len(args) > 0 {
+				found := false
+
+				for _, installPath := range args {
+					if installation.Path == installPath {
+						found = true
+						break
+					}
+				}
+
+				if !found {
+					continue
+				}
+			}
+
+			if err := installation.Install(global, nil); err != nil {
+				return err
+			}
+		}
+
 		return nil
 	},
 }