Add tuistash (#63)

Hi there! 

Thank you for `ratatui`. It's awesome! I've built a (non-official) TUI
for monitoring [Logstash](https://www.elastic.co/logstash):

[tuistash](https://github.com/edmocosta/tuistash) - A TUI for monitoring
Logstash.

README.md

@@ -157,6 +157,7 @@ Aside from those listed here, many other apps and libraries can be easily be fou
 - [ttyper](https://github.com/max-niederman/ttyper) - Terminal-based typing test.
 - [csvlens](https://github.com/YS-L/csvlens) - Command line csv viewer.
 - [mprocs](https://github.com/pvolok/mprocs) - Run multiple commands in parallel and shows output of each command separately.
+- [tuistash](https://github.com/edmocosta/tuistash) - A TUI for monitoring Logstash.
 
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