tasks: Add spawn option by tag (#25650)

Closes #19497
Fixed conflicts from https://github.com/zed-industries/zed/pull/19498
Added tags to tasks selector

Release Notes:

- Added ability to spawn tasks by tag with key bindings
- Added tags to tasks selector


https://github.com/user-attachments/assets/0eefea21-ec4e-407c-9d4f-2a0a4a0f74df

---------

Co-authored-by: Kirill Bulatov <mail4score@gmail.com>

assets/keymaps/default-linux.json

@@ -482,6 +482,8 @@
       "alt-shift-r": ["task::Spawn", { "reveal_target": "center" }]
       // also possible to spawn tasks by name:
       // "foo-bar": ["task::Spawn", { "task_name": "MyTask", "reveal_target": "dock" }]
+      // or by tag:
+      // "foo-bar": ["task::Spawn", { "task_tag": "MyTag" }],
     }
   },
   {

assets/keymaps/default-macos.json

@@ -608,6 +608,8 @@
       "ctrl-alt-shift-r": ["task::Spawn", { "reveal_target": "center" }]
       // also possible to spawn tasks by name:
       // "foo-bar": ["task::Spawn", { "task_name": "MyTask", "reveal_target": "dock" }]
+      // or by tag:
+      // "foo-bar": ["task::Spawn", { "task_tag": "MyTag" }],
     }
   },
   // Bindings from Sublime Text