Support fror code blocks

[chekos]

Code blocks seem to be more or less the same as other, as I've been calling, "text-y" blocks. Except they include a "language" property after the list of rich text objects (still within the block[_type] property.

{
  "type": "code",
  //...other keys excluded
  "code": {
    "text": [{
      "type": "text",
      "text": {
        "content": "const a = 3"
      }
    }],
    "language": "javascript"
  }
}

Option 1

Maybe this is as simple as "enclosing" md_text by "```" and grabbing the "language"

md_text = f"```{block[_type]['language']}\n{md_text}\n```"

[chekos]

md_text is actually executed/built for each text-rich object in the block and is appended to text_chunks list.

a quick solution is to append "\n```" at the end of text_chunks and "```{language}\n```" at the beginning.

right now, there is logic for the heading_* blocks before the text_chunks are calculated.

Option 1

To not change heading block logic we can .insert(0, "```{language}\n") and .append("\n```") to the text_chunks

[chekos]

Code block's rich-text objects don't have annotations - just text so the logic needs to be changed around the text_chunks for-loop.

[chekos]

actually...
it seems like code block rich-text objects include annotations just like any other rich-text object...