feat: enhance rich text editor with new features and plugins

- Added support for additional Lexical plugins: link, markdown, table, and checklist.
- Implemented Markdown shortcuts and transformers for horizontal rules and tables.
- Updated editor theme and styles to accommodate new elements like tables and links.
- Improved the overall functionality of the rich text editor with new matchers for URLs and emails.

src/editor/styles/editor.css

@@ -146,3 +146,103 @@
 .editor-nested-listitem {
   list-style-type: none;
 }
+
+/* Horizontal Rule */
+.editor-hr {
+  border: none;
+  border-top: 2px solid #ccc;
+  margin: 15px 0;
+}
+
+/* Link */
+.editor-link {
+  color: #0066cc;
+  text-decoration: none;
+  cursor: pointer;
+}
+
+.editor-link:hover {
+  text-decoration: underline;
+}
+
+/* Table */
+.editor-table {
+  border-collapse: collapse;
+  border-spacing: 0;
+  overflow-y: scroll;
+  overflow-x: scroll;
+  table-layout: fixed;
+  width: max-content;
+  margin: 15px 0;
+}
+
+.editor-table-cell {
+  border: 1px solid #ccc;
+  min-width: 75px;
+  vertical-align: top;
+  text-align: start;
+  padding: 6px 8px;
+  position: relative;
+  outline: none;
+}
+
+.editor-table-cell-header {
+  background-color: #f4f4f4;
+  font-weight: bold;
+  text-align: left;
+}
+
+/* Checklist */
+.editor-listitem-checked,
+.editor-listitem-unchecked {
+  position: relative;
+  margin-left: 8px;
+  margin-right: 8px;
+  padding-left: 24px;
+  padding-right: 24px;
+  list-style-type: none;
+  outline: none;
+}
+
+.editor-listitem-checked {
+  text-decoration: line-through;
+}
+
+.editor-listitem-unchecked:before,
+.editor-listitem-checked:before {
+  content: '';
+  width: 16px;
+  height: 16px;
+  top: 2px;
+  left: 0;
+  cursor: pointer;
+  display: block;
+  background-size: cover;
+  position: absolute;
+}
+
+.editor-listitem-unchecked:before {
+  border: 1px solid #999;
+  border-radius: 2px;
+}
+
+.editor-listitem-checked:before {
+  border: 1px solid #0066cc;
+  border-radius: 2px;
+  background-color: #0066cc;
+  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16'%3E%3Cpath fill='white' d='M13.5 2l-7.5 7.5-3.5-3.5-1.5 1.5 5 5 9-9z'/%3E%3C/svg%3E");
+  background-repeat: no-repeat;
+  background-position: center;
+}
+
+.editor-listitem-checked[dir='rtl']:before,
+.editor-listitem-unchecked[dir='rtl']:before {
+  left: auto;
+  right: 0;
+}
+
+.editor-listitem-checked[dir='rtl'],
+.editor-listitem-unchecked[dir='rtl'] {
+  padding-left: 24px;
+  padding-right: 24px;
+}