chore(go): enforce package coverage gates

cmd/homesick/main.go

@@ -1,12 +1,17 @@
 package main
 
 import (
+	"io"
 	"os"
 
 	"git.hrafn.xyz/aether/gosick/internal/homesick/cli"
 )
 
 func main() {
-	exitCode := cli.Run(os.Args[1:], os.Stdout, os.Stderr)
+	exitCode := run(os.Args[1:], os.Stdout, os.Stderr)
 	os.Exit(exitCode)
 }
+
+func run(args []string, stdout io.Writer, stderr io.Writer) int {
+	return cli.Run(args, stdout, stderr)
+}