chore: Create a story for InvalidCustomNetworkAlert component

[devin-ai-integration[bot]]

Description

[TODO] Write a short description of the changes included in this pull request, also include relevant motivation and context. Have in mind the following questions:

1. What is the reason for the change?
2. What is the improvement/solution? -->

Related issues

Manual testing steps

3. Go to the latest build of storybook in this PR
4. Navigate to the InvalidCustomNetworkAlert component in the Components/ folder.

Screenshots/Recordings

Pre-merge author checklist

• [X] I’ve followed MetaMask Coding Standards.
• [X] I've completed the PR template to the best of my ability
• [X] I’ve included tests if applicable
• [X] I’ve documented my code using JSDoc format if applicable
• [X] I’ve applied the right labels on the PR (see labeling guidelines). Not required for external contributors.

Pre-merge reviewer checklist

• [ ] I've manually tested the PR (e.g. pull and build branch, run the app, test code being changed).
• [ ] I confirm that this PR addresses all acceptance criteria described in the ticket it closes and includes the necessary testing evidence such as recordings and or screenshots.