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/Cargo.toml

@@ -12,7 +12,7 @@
 [package]
 edition = "2024"
 name = "sacp-tokio"
-version = "11.0.0-alpha.1"
+version = "11.0.0"
 build = false
 autolib = false
 autobins = false
@@ -45,7 +45,7 @@ path = "tests/debug_logging.rs"
 version = "0.3.31"
 
 [dependencies.sacp]
-version = "11.0.0-alpha.1"
+version = "11.0.0"
 
 [dependencies.serde]
 version = "1.0"