Tidy up DAP initialization (#28730)

To make DAP work over SSH we want to create the binary
at the project level (so we can wrap it in an `ssh` invocation
transparently).

This means not pushing the adapter down into the session, and resolving
more information ahead-of-time.

Co-authored-by: Anthony Eid <hello@anthonyeid.me>
Co-authored-by: Piotr <piotr@zed.dev>

Release Notes:

- N/A

---------

Co-authored-by: Anthony Eid <hello@anthonyeid.me>
Co-authored-by: Piotr <piotr@zed.dev>
Co-authored-by: Piotr Osiewicz <24362066+osiewicz@users.noreply.github.com>
Co-authored-by: Anthony <anthony@zed.dev>

crates/dap_adapters/src/dap_adapters.rs

@@ -12,7 +12,7 @@ use anyhow::{Result, anyhow};
 use async_trait::async_trait;
 use codelldb::CodeLldbDebugAdapter;
 use dap::{
-    DapRegistry,
+    DapRegistry, DebugRequestType,
     adapters::{
         self, AdapterVersion, DapDelegate, DebugAdapter, DebugAdapterBinary, DebugAdapterName,
         GithubRepo,
@@ -25,7 +25,7 @@ use lldb::LldbDebugAdapter;
 use php::PhpDebugAdapter;
 use python::PythonDebugAdapter;
 use serde_json::{Value, json};
-use task::{DebugAdapterConfig, TCPHost};
+use task::TCPHost;
 
 pub fn init(registry: Arc<DapRegistry>) {
     registry.add_adapter(Arc::from(CodeLldbDebugAdapter::default()));
@@ -51,3 +51,16 @@ pub(crate) async fn configure_tcp_connection(
 
     Ok((host, port, timeout))
 }
+
+trait ToDap {
+    fn to_dap(&self) -> dap::StartDebuggingRequestArgumentsRequest;
+}
+
+impl ToDap for DebugRequestType {
+    fn to_dap(&self) -> dap::StartDebuggingRequestArgumentsRequest {
+        match self {
+            Self::Launch(_) => dap::StartDebuggingRequestArgumentsRequest::Launch,
+            Self::Attach(_) => dap::StartDebuggingRequestArgumentsRequest::Attach,
+        }
+    }
+}