Internal file paths are now Markdown image paths

In the last commit, file paths were implemented to be the full path for the API, however that is not necessary.
Before this change: /data/assets/filename.svg
After: assets/filename.svg
The new method is what SiYuan uses for Markdown images, like ![Drawing](assets/filename.svg)

src/protyle.ts

@@ -0,0 +1,46 @@
+import {getBlockByID, sql, updateBlock} from "@/api";
+import {escapeRegExp} from "@/helper";
+
+export async function findImageBlocks(src: string) {
+
+    const sqlQuery = `
+        SELECT id, markdown 
+        FROM blocks 
+        WHERE markdown like '%${src}%'
+    `;
+
+    try {
+        return await sql(sqlQuery);
+    } catch (error) {
+        console.error('Error searching for image blocks:', error);
+        return [];
+    }
+
+}
+export async function replaceBlockContent(
+    blockId: string,
+    searchStr: string,
+    replaceStr: string
+): Promise<boolean> {
+    try {
+
+        const block = await getBlockByID(blockId);
+        if (!block) {
+            throw new Error('Block not found');
+        }
+
+        const originalContent = block.markdown;
+        const newContent = originalContent.replace(escapeRegExp(searchStr), replaceStr);
+
+        if (newContent === originalContent) {
+            return false;
+        }
+
+        await updateBlock('markdown', newContent, blockId);
+        return true;
+
+    } catch (error) {
+        console.error('Failed to replace block content:', error);
+        return false;
+    }
+}