chore: upgrade sacp to 11.0.0 stable and agent-client-protocol-schema to 0.11

- Upgrade sacp/sacp-tokio from 11.0.0-alpha.1 to 11.0.0 stable
- Upgrade agent-client-protocol-schema from 0.10 to 0.11
- Rebase vendor/sacp-tokio patches (kill_tree, CREATE_NO_WINDOW, stderr
  truncation) onto official 11.0.0 baseline
- Adapt renamed types: FileSystemCapability → FileSystemCapabilities,
  KillTerminalCommandRequest/Response → KillTerminalRequest/Response

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src-tauri/vendor/sacp-tokio/src/lib.rs

@@ -7,7 +7,7 @@
 mod acp_agent;
 
 pub use acp_agent::{AcpAgent, LineDirection};
-use sacp::{ByteStreams, Role, ConnectTo};
+use sacp::{ByteStreams, ConnectTo, Role};
 use std::sync::Arc;
 use tokio_util::compat::{TokioAsyncReadCompatExt, TokioAsyncWriteCompatExt};
 
@@ -38,7 +38,10 @@ impl Default for Stdio {
 }
 
 impl<Counterpart: Role> ConnectTo<Counterpart> for Stdio {
-    async fn connect_to(self, client: impl ConnectTo<Counterpart::Counterpart>) -> Result<(), sacp::Error> {
+    async fn connect_to(
+        self,
+        client: impl ConnectTo<Counterpart::Counterpart>,
+    ) -> Result<(), sacp::Error> {
         if let Some(callback) = self.debug_callback {
             use futures::AsyncBufReadExt;
             use futures::AsyncWriteExt;
@@ -73,8 +76,11 @@ impl<Counterpart: Role> ConnectTo<Counterpart> for Stdio {
             ))
                 as std::pin::Pin<Box<dyn futures::Sink<String, Error = std::io::Error> + Send>>;
 
-            ConnectTo::<Counterpart>::connect_to(sacp::Lines::new(outgoing_sink, incoming_lines), client)
-                .await
+            ConnectTo::<Counterpart>::connect_to(
+                sacp::Lines::new(outgoing_sink, incoming_lines),
+                client,
+            )
+            .await
         } else {
             // Without debug: use simple ByteStreams
             ConnectTo::<Counterpart>::connect_to(