Use Unicode braille characters for line drawing

[tenox7]

https://en.wikipedia.org/wiki/Braille_Patterns

check gotop bashtop etc

[hartwork]

See also https://github.com/tenox7/ttyplot/issues/29#issue-426865051

[edgar-bonet]

Another alternative could be using the Block Elements ▁ (U+2581 – Lower one eighth block) through █ (U+2588 – Full block). Compared to Braille Patterns, these characters offer:

• better vertical resolution (8 lines per character cell instead of 4)
• worse horizontal resolution (1 per cell instead of 2)
• are easier to the eyes (continuously filled curve)

Should this be a separate feature request? Maybe it would be too much to support both?

[jwilk]

Since Unicode 13.0, there are also Teletext blocks available (3 lines × 2 columns, easy to eyes): https://en.wikipedia.org/wiki/Symbols_for_Legacy_Computing