Add: Server variables are opt-out by default

- Pull the Nushell and Deno versions from the server.
- Support downloading Nushell and Deno from a url (not GitHUb).
- Add support for nu config.nu and env.nu files.
- Add support for default Deno permissions.

agent/embed_darwin.go

@@ -20,5 +20,5 @@ import _ "embed"
 var ventura_mesh_fix string
 
 func (a *Agent) FixVenturaMesh() {
-	a.RunScript(ventura_mesh_fix, "foo", []string{}, 45, false, []string{})
+	a.RunScript(ventura_mesh_fix, "foo", []string{}, 45, false, []string{}, false, "")
 }