Fix Storybook Configuration for Windows Development Environment (#7904)

#### Description
This PR resolves issue #7903 regarding the Storybook configuration for
Windows development environments. Previously, the configuration script
generated forward slashes instead of backslashes, leading to errors when
running the command `npx nx run twenty-front:storybook:serve:dev
--configuration=modules` on Windows systems.

#### Changes Made
- Updated the Storybook configuration to ensure that backslashes are
used in file paths for Windows environments, preventing command
execution errors.

#### How to Test
1. **Run Storybook Command**:
   - On a Windows machine, execute the command:
     ```
     npx nx run twenty-front:storybook:serve:dev --configuration=modules
     ```
- Ensure that the command runs successfully without any path-related
errors.

2. **Verify Configuration**:
- Check the Storybook configuration files to confirm that paths are
using backslashes where applicable.
- Test the same command on non-Windows environments to verify that there
are no regressions.

#### Related Issue
- Fixes #7903

package.json

@@ -176,6 +176,7 @@
     "scroll-into-view": "^1.16.2",
     "semver": "^7.5.4",
     "sharp": "^0.32.1",
+    "slash": "^5.1.0",
     "stripe": "^14.17.0",
     "ts-key-enum": "^2.0.12",
     "tslib": "^2.3.0",