Code to allow opening zed:/channel/1234

Refactored a bit how url arguments are handled to avoid adding too much
extra complexity to main.

crates/cli/src/main.rs

@@ -182,6 +182,7 @@ impl Bundle {
                         kCFStringEncodingUTF8,
                         ptr::null(),
                     ));
+                    // equivalent to: open zed-cli:... -a /Applications/Zed\ Preview.app
                     let urls_to_open = CFArray::from_copyable(&[url_to_open.as_concrete_TypeRef()]);
                     LSOpenFromURLSpec(
                         &LSLaunchURLSpec {