Use text/template where possible in code base

[prarit]

From comments in https://github.com/zaquestion/lab/pull/437

@zaquestion recommends this as a change to the text input usage in lab.

This is the best reference in the repo most likely

https://github.com/zaquestion/lab/blob/fea5044402775b8777520f7dfcc03d0804a6ba1b/cmd/mr_create.go#L246-L295