refactor(icons): replace MUI icons in PolicyDetailsModal and RichTextEditor with custom SVGs

- Replaced `@mui/icons-material` icons (`FormatBold`, `FormatItalic`, `FormatUnderlined`, `FormatQuote`, `LooksOne`, `LooksTwo`, `Looks3`, `FormatListBulleted`, `FormatListNumbered`) with respective custom SVGs.
- Updated imports for seamless integration.

Author: solan117

Clients/src/presentation/assets/icons/formatBold.svg

@@ -14,15 +14,13 @@ import {
   BlockquotePlugin,
 } from "@platejs/basic-nodes/react";
 import { serializeHtml } from "platejs";
-import {
-  FormatBold,
-  FormatItalic,
-  FormatUnderlined,
-  FormatQuote,
-  LooksOne,
-  LooksTwo,
-  Looks3,
-} from "@mui/icons-material";
+import {ReactComponent as Looks3} from "../../assets/icons/three.svg"
+import {ReactComponent as LooksOne} from "../../assets/icons/one.svg"
+import {ReactComponent as LooksTwo} from "../../assets/icons/two.svg"
+import {ReactComponent as FormatBold} from "../../assets/icons/formatBold.svg"
+import {ReactComponent as FormatQuote} from "../../assets/icons/formatQuote.svg"
+import {ReactComponent as FormatItalic} from "../../assets/icons/formatItalic.svg"
+import {ReactComponent as FormatUnderlined} from "../../assets/icons/formatUnderlined.svg"
 import { IconButton, Tooltip, useTheme, Box } from "@mui/material";
 import { Drawer, Stack, Typography, Divider } from "@mui/material";
 import { ReactComponent as CloseGreyIcon } from "../../assets/icons/close-grey.svg";