Enhance README and refactor code structure for improved functionality

- Updated README.md with detailed project description, features, and installation instructions.
- Refactored functions.php to include configuration settings and improved database handling.
- Modified index.php for better user experience and added pagination controls.
- Introduced new utility functions for API handling and database interactions.
- Added CSS styles for improved layout and visibility of elements.
- Removed vault.csv as data is now managed through the database.
- Implemented FTP deployment workflow for automated deployment.
- Added exception handling classes for better error management.
- Created JavaScript functions for pagination of transaction records.

script.js

@@ -0,0 +1,44 @@
+let currentPage = 1;
+
+function paginate() {
+  const table = document.getElementById('data');
+  const rows = table.querySelectorAll('tbody tr');
+  const totalPages = Math.ceil(rows.length / rowsPerPage);
+
+  // Hide all rows
+  rows.forEach(row => row.style.display = 'none');
+
+  // Show only the rows for the current page
+  let startRow = (currentPage - 1) * rowsPerPage;
+  let endRow = Math.min(currentPage * rowsPerPage, rows.length);
+
+  for (let i = startRow; i < endRow; i++) {
+    rows[i].style.display = '';
+  }
+
+  // Update pagination info
+  document.getElementById('page-info').textContent = `Page ${currentPage} of ${totalPages}`;
+
+  // Optionally hide the "Previous" button on the first page and the "Next" button on the last page
+  document.querySelector('#pagination-controls > button:nth-child(1)').disabled = currentPage === 1;
+  document.querySelector('#pagination-controls > button:nth-child(2)').disabled = currentPage === 1;
+  document.querySelector('#pagination-controls > button:nth-child(4)').disabled = currentPage === totalPages;
+  document.querySelector('#pagination-controls > button:nth-child(5)').disabled = currentPage === totalPages;
+
+  // Make the table visible after pagination is applied
+  table.style.visibility = 'visible';
+}
+
+function changePage(direction) {
+  const totalPages = Math.ceil(document.querySelectorAll('#data tbody tr').length / rowsPerPage);
+
+  if (direction === -999) {
+    currentPage = 1; // Go to first page
+  } else if (direction === 999) {
+    currentPage = totalPages; // Go to last page
+  } else if ((direction === -1 && currentPage > 1) || (direction === 1 && currentPage < totalPages)) {
+    currentPage += direction; // Move one step
+  }
+
+  paginate();
+}