Adding basic merge string command.

This command combines multiple <filename>.go.<langauge>.json files
together into an all.<lanugage>.json file per package.
-merge-strings can now recurse into child directories

improve '-h' readibility
added verbose mode to -merge-strings
test for -merge-strings -d option
test for -merge-strings '-r' option
test for -merge-string '-source-languange' option

[Finishes #70553354]
GoFormat!