Open URIs from the CLI, support for the zed:// URI scheme on Linux (#14104)

Allows Zed to open custom `zed://` links (redirects from
https://zed.dev/channels) on Linux used XDG MIME types.

This PR also allows the CLI to be able to open Zed (`zed://`) URIs
directly instead of executing the main executable in
`/usr/libexec/zed-editor`.


Release Notes:

- Linux: Allow `zed.dev/channel` (`zed://`) URIs to open on Linux
- CLI: Ability to open URIs from the command line

---------

Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com>

crates/cli/src/cli.rs

@@ -11,6 +11,7 @@ pub struct IpcHandshake {
 pub enum CliRequest {
     Open {
         paths: Vec<String>,
+        urls: Vec<String>,
         wait: bool,
         open_new_workspace: Option<bool>,
         dev_server_token: Option<String>,