CSV embed using wiki-link transclusion format

[gradedSystem]

Changelog

Added

• CSV Embedding: Implemented support for embedding CSV files using ![[data.csv]] syntax. CSV files are rendered as tables in markdown.

Updated

• fromMarkdown.ts: Modified to handle CSV files by rendering them as tables.
• html.ts: Updated to output CSV files as HTML tables when using the ![[data.csv]] syntax.

Reference

Issue #1233

cc @olayway