inFile fix, filename detection improvement and ignore path pattern

Changelog

Fix generation of inFile (Workflow) when one element is changed (not an array)
Improve syntactic coloration in the README
Improve regex to handle filename detection containing self extension
Ability to use an ignore file to avoid generate delta for the elements to ignore.

Added

• Ignore parameter to input .forceignore file path and not consider matching files for treatment thanks to @jjulicher
• Wave metadata support (Einstein Analytics)

Changed

• README Syntactic coloration thanks to @pozil
• Filename containing its extension regex improvement thanks to @jjulicher

Fixed

• InFile generation for unitary subtype element handling