chore: add dataviewjs example

Author: leangseu

test-vault/example read tables.md

@@ -2,3 +2,16 @@
 ```dataview
 TABLE file.tables WHERE length(file.tables) > 0
 ```
+
+```dataviewjs
+
+const tables = dv.pages('"tables"').file.tables
+
+// show table for the last 5 days
+for (let table of tables) {
+  dv.table(
+    table.headers,
+    table.rows
+  )
+}
+```