new path picker (#11015)

Still TODO:

* Disable the new save-as for local projects
* Wire up sending the new path to the remote server

Release Notes:

- Added the ability to "Save-as" in remote projects

---------

Co-authored-by: Nathan <nathan@zed.dev>
Co-authored-by: Bennet <bennetbo@gmx.de>

crates/gpui/src/platform.rs

@@ -693,7 +693,7 @@ pub struct PathPromptOptions {
 }
 
 /// What kind of prompt styling to show
-#[derive(Copy, Clone, Debug)]
+#[derive(Copy, Clone, Debug, PartialEq)]
 pub enum PromptLevel {
     /// A prompt that is shown when the user should be notified of something
     Info,
@@ -703,6 +703,10 @@ pub enum PromptLevel {
 
     /// A prompt that is shown when a critical problem has occurred
     Critical,
+
+    /// A prompt that is shown when asking the user to confirm a potentially destructive action
+    /// (overwriting a file for example)
+    Destructive,
 }
 
 /// The style of the cursor (pointer)