Strictly speaking, one couldn't do it properly, rendering the pages as actual text for TUIs rather than graphically for GUIs, until Unicode version 13 came along, which included the necessary block graphics characters and which was only 5 years ago.
And even then one needs modern fonts like Viznut's Unscii or GNU Unifont or which cover the necessary code points (or one of the terminal emulators that algorithmically constructs block and line characters, and has been updated for Unicode 13).
* https://github.com/jdebp/unscii/blob/2.1.1f/src/grids.txt#L4...
* https://github.com/jdebp/unscii/blob/2.1.1f/src/grids.txt#L9...