fix(global): monitor workspaces dir change (#337)

### TL;DR

Added `is_monorepo` flag to `PackageManager` to properly handle monorepo workspace packages in fingerprint ignores.

### What changed?

- Added an `is_monorepo` field to the `PackageManager` struct to track whether the workspace is a monorepo
- Modified `get_fingerprint_ignores()` to return a `Result` and include parent directories of workspace packages in monorepos
- Added detection logic to determine if a workspace is a monorepo based on the presence of workspace configuration files
- Updated all test fixtures to include the new `is_monorepo` field
- Added a new snap test for issue [#31](voidzero-dev/vite-task#31) to verify the fix works correctly

<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> Detects monorepos and updates fingerprint ignores to watch workspace parent dirs, wires the change through install, and adds a snap test; also whitelists VITE_* env vars.
> 
> - **vite_install (core)**:
>   - `PackageManager`:
>     - Add `is_monorepo` flag; detect via `WorkspaceFile` in builder.
>     - Change `get_fingerprint_ignores()` to return `Result` and, when monorepo, include parent dirs of workspace packages using `get_package_graph()`.
>   - Import `get_package_graph` and update ignores logic/tests (add monorepo-specific test).
>   - Update test helpers across `commands/*` to set `is_monorepo: false`.
> - **CLI (install)**:
>   - Propagate errors from `package_manager.get_fingerprint_ignores()?` when building the task.
> - **Tests/Snaps**:
>   - Add `packages/global/snap-tests/command-install-bug-31/*` to verify workspace dir changes are detected (issue #31).
> - **Tools**:
>   - Allow `VITE_*` env vars to pass through in `packages/tools/src/utils.ts`.
> 
> <sup>Written by [Cursor Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit 6e76efa. This will update automatically on new commits. Configure [here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

Author: fengmk2

crates/vite_install/src/commands/add.rs

@@ -230,6 +230,7 @@ mod tests {
             hash: None,
             bin_name: pm_type.to_string().into(),
             workspace_root: temp_dir_path.clone(),
+            is_monorepo: false,
             install_dir,
         }
     }

crates/vite_install/src/commands/cache.rs

@@ -151,6 +151,7 @@ mod tests {
             hash: None,
             bin_name: pm_type.to_string().into(),
             workspace_root: temp_dir_path.clone(),
+            is_monorepo: false,
             install_dir,
         }
     }

crates/vite_install/src/commands/config.rs

@@ -161,6 +161,7 @@ mod tests {
             hash: None,
             bin_name: pm_type.to_string().into(),
             workspace_root: temp_dir_path.clone(),
+            is_monorepo: false,
             install_dir,
         }
     }

crates/vite_install/src/commands/dedupe.rs

@@ -98,6 +98,7 @@ mod tests {
             hash: None,
             bin_name: pm_type.to_string().into(),
             workspace_root: temp_dir_path.clone(),
+            is_monorepo: false,
             install_dir,
         }
     }

crates/vite_install/src/commands/link.rs

@@ -89,6 +89,7 @@ mod tests {
             hash: None,
             bin_name: pm_type.to_string().into(),
             workspace_root: temp_dir_path.clone(),
+            is_monorepo: false,
             install_dir,
         }
     }

crates/vite_install/src/commands/list.rs

@@ -303,6 +303,7 @@ mod tests {
             hash: None,
             bin_name: pm_type.to_string().into(),
             workspace_root: temp_dir_path.clone(),
+            is_monorepo: false,
             install_dir,
         }
     }

crates/vite_install/src/commands/outdated.rs

@@ -306,6 +306,7 @@ mod tests {
             hash: None,
             bin_name: pm_type.to_string().into(),
             workspace_root: temp_dir_path.clone(),
+            is_monorepo: false,
             install_dir,
         }
     }

crates/vite_install/src/commands/owner.rs

@@ -98,6 +98,7 @@ mod tests {
             hash: None,
             bin_name: pm_type.to_string().into(),
             workspace_root: temp_dir_path.clone(),
+            is_monorepo: false,
             install_dir,
         }
     }

crates/vite_install/src/commands/pack.rs

@@ -209,6 +209,7 @@ mod tests {
             hash: None,
             bin_name: pm_type.to_string().into(),
             workspace_root: temp_dir_path.clone(),
+            is_monorepo: false,
             install_dir,
         }
     }
@@ -497,6 +498,7 @@ mod tests {
             hash: None,
             bin_name: "npm".into(),
             workspace_root: temp_dir_path.clone(),
+            is_monorepo: false,
             install_dir,
         };
 
@@ -531,6 +533,7 @@ mod tests {
             hash: None,
             bin_name: "pnpm".into(),
             workspace_root: temp_dir_path.clone(),
+            is_monorepo: false,
             install_dir,
         };
 

crates/vite_install/src/commands/prune.rs

@@ -109,6 +109,7 @@ mod tests {
             hash: None,
             bin_name: pm_type.to_string().into(),
             workspace_root: temp_dir_path.clone(),
+            is_monorepo: false,
             install_dir,
         }
     }