feat: use full Ark amounts in core-tester-cli instead

[paroxysm]

For more intuitive testing, specify full Ark amounts(as seen on explorer line items) as opposed to Arktoshi values in core-tester-cli commands. It's much more straight forward to type
node tester transfer -a 0.9 -recipient ... instead trying to convert 0.9 into Arktoshi.
It's also more in-line with the explorer as you see the same notation on there.

Proposed changes

Types of changes

• New feature (non-breaking change which adds functionality)

Checklist

• I have read the CONTRIBUTING documentation
• Lint and unit tests pass locally with my changes

[codecov-io]

Codecov Report

Merging #1260 into develop will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop    #1260   +/-   ##
========================================
  Coverage    78.85%   78.85%           
========================================
  Files          413      413           
  Lines         7003     7003           
  Branches       941      941           
========================================
  Hits          5522     5522           
  Misses        1309     1309           
  Partials       172      172

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