Edit/Delete Feature Added

Transaction Edit and Delete feature added.

Note from the contributor from their issue:

Description
Need to implement basic edit and delete operations for transactions. Users should be able to modify transaction details or remove transactions when needed.

Features
Edit transaction amount
Edit transaction date
Edit transaction category/type
Delete transaction with confirmation

UI Enhancement

Note from the Contributor:

Improving the dashboard UI design to make it more better in terms of UI-UX and user engagement . There are few areas in which dashboard design lags and doesn't give good UI vibe and user interaction. Here are few points , I suggest for improvement .

Typography & Layout Enhancements
Adjust font weights for key headings and primary information to improve visual hierarchy (e.g., "Dashboard" title, income amount).
Increase padding and spacing between sections for better readability and a more spacious layout.
Using Cards to show the budegt related statistics.
Using custom icons to show the transaction history.
Here is the improved design , I am suggesting, I have already done the changes. Let me know if any further improvement in this or if you like the design approve this , I will create pull request.