feat: add read accessors to PackageQueryArgs

Add `is_recursive()`, `is_workspace_root()`, and `filter()` accessor
methods so downstream consumers can inspect the parsed flags before
calling `into_package_query()`. This is needed for vp exec to determine
workspace mode and root-exclusion logic without accessing private fields.

Author: fengmk2

crates/vite_workspace/src/package_filter.rs

@@ -245,6 +245,21 @@ Match packages by name, directory, or glob pattern.
 }
 
 impl PackageQueryArgs {
+    /// Whether `--recursive` / `-r` was set.
+    pub fn is_recursive(&self) -> bool {
+        self.recursive
+    }
+
+    /// Whether `--workspace-root` / `-w` was set.
+    pub fn is_workspace_root(&self) -> bool {
+        self.workspace_root
+    }
+
+    /// The `--filter` / `-F` values (possibly empty).
+    pub fn filter(&self) -> &[Str] {
+        &self.filter
+    }
+
     /// Convert CLI arguments into an opaque [`PackageQuery`].
     ///
     /// `package_name` is the optional package name from a `package#task` specifier.