Renderer: Better Tables

[splitbrain]

Currently table support is super rudimentary. Ideally tables should be formatted into text handling the following:

• support cell alignment
• support colspans
• support rowspans
• use box drawing chars
• auto align table borders based on max column width
• reflow cell content based on max column widths and a max table width
• use a syntax that allows sequentially adding table data (to be easy to use in our renderer)

This could probably be implemented in a separate library as it it probably useful for others