Adding arguments to kprove flags

[Robertorosmaninho]

Follow up of #3619, #3638, and #3642!

This PR enhances the usability of kprove --help and kprove --help-hidden by providing flag descriptors to help the user understand when an argument needs to be provided to the flag.

Ex.:

Before

Usage: kprove [options] <file>
  Options:
    --branching-allowed
      Number of branching events allowed before a forcible stop.
      Default: 2147483647

Now:

Usage: kprove [options] <file>
  Options:
    --branching-allowed <value>
      Number of branching events allowed before a forcible stop.
      Default: 2147483647

Among others, this PR introduces the following arguments to the respective parameters:

parameter	argument
--branching-allowed	<number>
--claims	<labels>
--color	<mode>
--debug-script	<file>
--default-claim-type	<type>
--definition	<path>
--depth	<number>
--emit-json-spec	<file>
--exclude	<labels>
--output, -o	<mode>
--output-file	<file>
--output-flatten	<KLabels>
--output-omit	<KLabels>
--output-tokast	<KLabels>
--output-tokenize	<KLabels>
--spec-module, -sm	<name>
--trusted	<labels>
--haskell-backend-command	<command>
--haskell-backend-home	<directory>
--smt-timeout	<milliseconds>

[radumereuta]

A few suggestions.
Ping me again when you answered all of them and tests passed.

[Robertorosmaninho]

@radumereuta, I've implemented your comments! However, I would appreciate a new round on the comment I didn't mark resolved!

[radumereuta]

lgtm