feat(shared-filesystem-storage): migrate EditShareNetworkForm to functional TypeScript (#2032)

[hodanoori]

Summary

Migrates EditShareNetworkForm in the shared filesystem storage plugin from a class component to a functional TypeScript component as part of the React 19 migration epic (#1774).

Changes Made

• Replace class component EditShareNetworkForm with a functional TypeScript component in edit.tsx
• Replace UNSAFE_componentWillReceiveProps with useEffect reacting to the shareNetwork prop
• Convert show state to useState, close and onSubmit to useCallback
• Add TypeScript interfaces for ShareNetwork, History, and EditShareNetworkFormProps
• Delete edit.jsx
• Add edit.test.tsx with 9 unit tests covering modal visibility, form fields, cancel behaviour, and form submission

Related Issues

• Issue: closes [Task](shared_networks): Migrate share_networks/edit.jsx to React 19 #2032
• Epic: [EPIC](react-19): Upgrade to React 19 #1774

Screenshots (if applicable)

Checklist

• I have performed a self-review of my code.
• I have commented my code, particularly in hard-to-understand areas.
• I have added tests that prove my fix is effective or that my feature works.
• New and existing unit tests pass locally with my changes.
• I have made corresponding changes to the documentation (if applicable).
• My changes generate no new warnings or errors.