Fix remoting things (#19587)

- Fixes modal closing when using the remote modal folder 
- Fixes a bug with local terminals where they could open in / instead of
~
- Fixes a bug where SSH connections would continue running after their
window is closed
- Hides SSH Terminal process details from Zed UI
- Implement `cmd-o` for remote projects
- Implement LanguageServerPromptRequest for remote LSPs

Release Notes:

- N/A

crates/task/src/lib.rs

@@ -269,5 +269,7 @@ pub enum Shell {
         program: String,
         /// The arguments to pass to the program.
         args: Vec<String>,
+        /// An optional string to override the title of the terminal tab
+        title_override: Option<SharedString>,
     },
 }