Feature request: underscore to spaces

[pkcinna01]

I'm submitting a ... (check one with "x")

[ ] bug report => search github for a similar issue or PR before submitting
[ x] feature request

• Ngx-pipes version: 1.X.X

Current behavior

there is misc support for converting to underscores or camel case but nothing to convert json variables to UI friendly titles

Expected behavior
provide a pipe that takes snake case (underscores) and converts to locale friendly text by converting to spaces. I have encountered a need for these two scenarios:

1. camel case => UI title
2. snake case => UI title

Minimal reproduction of the problem with instructions

Please tell us about your environment:

• Angular version: 7.X.X

• Node (for AoT issues): node --version =

[ksvkabra]

#257