Allow clients to run Zed tasks on remote projects (#12199)

Release Notes:

- Enabled Zed tasks on remote projects with ssh connection string
specified

---------

Co-authored-by: Conrad Irwin <conrad@zed.dev>

crates/rpc/proto/zed.proto

@@ -245,7 +245,12 @@ message Envelope {
 
         RegenerateDevServerToken regenerate_dev_server_token = 200;
         RegenerateDevServerTokenResponse regenerate_dev_server_token_response = 201;
-        RenameDevServer rename_dev_server = 202; // Current max
+        RenameDevServer rename_dev_server = 202;
+
+        TaskContextForLocation task_context_for_location = 203;
+        TaskContext task_context = 204;
+        TaskTemplatesResponse task_templates_response = 205;
+        TaskTemplates task_templates = 206; // Current max
     }
 
     reserved 158 to 161;
@@ -2118,3 +2123,71 @@ message GetSupermavenApiKey {}
 message GetSupermavenApiKeyResponse {
     string api_key = 1;
 }
+
+message TaskContextForLocation {
+    uint64 project_id = 1;
+    Location location = 2;
+}
+
+message TaskContext {
+    optional string cwd = 1;
+    map<string, string> task_variables = 2;
+}
+
+message TaskTemplates {
+    uint64 project_id = 1;
+    optional Location location = 2;
+    optional uint64 worktree_id = 3;
+}
+
+message TaskTemplatesResponse {
+    repeated TemplatePair templates = 1;
+}
+
+message TemplatePair {
+    TaskSourceKind kind = 1;
+    TaskTemplate template = 2;
+}
+
+message TaskTemplate {
+    string label = 1;
+    string command = 2;
+    repeated string args = 3;
+    map<string, string> env = 4;
+    optional string cwd = 5;
+    bool use_new_terminal = 6;
+    bool allow_concurrent_runs = 7;
+    RevealStrategy reveal = 8;
+    repeated string tags = 9;
+}
+
+enum RevealStrategy {
+    Always = 0;
+    Never = 1;
+}
+
+message TaskSourceKind {
+    oneof kind {
+        UserInput user_input = 1;
+        Worktree worktree = 2;
+        AbsPath abs_path = 3;
+        Language language = 4;
+    }
+
+    message UserInput {}
+
+    message Worktree {
+        uint64 id = 1;
+        string abs_path = 2;
+        string id_base = 3;
+    }
+
+    message AbsPath {
+        string id_base = 1;
+        string abs_path = 2;
+    }
+
+    message Language {
+        string name = 1;
+    }
+}

crates/rpc/src/proto.rs

@@ -279,6 +279,10 @@ messages!(
     (StartLanguageServer, Foreground),
     (SynchronizeBuffers, Foreground),
     (SynchronizeBuffersResponse, Foreground),
+    (TaskContextForLocation, Background),
+    (TaskContext, Background),
+    (TaskTemplates, Background),
+    (TaskTemplatesResponse, Background),
     (Test, Foreground),
     (Unfollow, Foreground),
     (UnshareProject, Foreground),
@@ -326,7 +330,7 @@ messages!(
     (RegenerateDevServerToken, Foreground),
     (RegenerateDevServerTokenResponse, Foreground),
     (RenameDevServer, Foreground),
-    (OpenNewBuffer, Foreground)
+    (OpenNewBuffer, Foreground),
 );
 
 request_messages!(
@@ -414,6 +418,8 @@ request_messages!(
     (SetChannelVisibility, Ack),
     (ShareProject, ShareProjectResponse),
     (SynchronizeBuffers, SynchronizeBuffersResponse),
+    (TaskContextForLocation, TaskContext),
+    (TaskTemplates, TaskTemplatesResponse),
     (Test, Test),
     (UpdateBuffer, Ack),
     (UpdateParticipantLocation, Ack),
@@ -481,6 +487,8 @@ entity_messages!(
     SearchProject,
     StartLanguageServer,
     SynchronizeBuffers,
+    TaskContextForLocation,
+    TaskTemplates,
     UnshareProject,
     UpdateBuffer,
     UpdateBufferFile,