feat: add command for arbitrary URLs (#137)

* feat: install command for direct downloads

* use sha1 instead of sha256

* apply suggestions

* feat: parse urls instead of using hasprefix

* stop by default and add force flag

* Implement various fixes and improvements

Co-authored-by: Tricked <72335827+SkyBlockDev@users.noreply.github.com>
Co-authored-by: comp500 <comp500@users.noreply.github.com>

url/url.go

@@ -0,0 +1,15 @@
+package url
+
+import (
+	"github.com/packwiz/packwiz/cmd"
+	"github.com/spf13/cobra"
+)
+
+var urlCmd = &cobra.Command{
+	Use:   "url",
+	Short: "Add external files from a direct download link, for sites that are not directly supported by packwiz",
+}
+
+func init() {
+	cmd.Add(urlCmd)
+}