Disable test/doctest harness for vite_task_tools lib target

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

Author: branchseer

crates/vite_task_tools/Cargo.toml

@@ -11,5 +11,9 @@ rust-version.workspace = true
 json-patch = { workspace = true }
 serde_json = { workspace = true }
 
+[lib]
+test = false
+doctest = false
+
 [lints]
 workspace = true