feat: core-utils

[faustbrian]

Proposed changes

Moves some commonly shared utilities into a package core-utils which can be re-used by other packages and reduces duplication at the same time.

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
• I have added tests that prove my fix is effective or that my feature works

[codecov-io]

Codecov Report

Merging #1077 into develop will decrease coverage by 0.02%.
The diff coverage is 100%.

@@             Coverage Diff             @@
##           develop    #1077      +/-   ##
===========================================
- Coverage    73.19%   73.16%   -0.03%     
===========================================
  Files          421      423       +2     
  Lines         6867     6871       +4     
  Branches       877      878       +1     
===========================================
+ Hits          5026     5027       +1     
- Misses        1642     1647       +5     
+ Partials       199      197       -2

Impacted Files	Coverage Δ
packages/core-utils/lib/format-timestamp.js	100% <100%> (ø)
...ages/core-api/lib/versions/2/transformers/block.js	100% <100%> (ø)	⬆️
...ckages/core-database/lib/repositories/delegates.js	70.37% <100%> (ø)	⬆️
...s/core-api/lib/versions/2/transformers/delegate.js	85.71% <100%> (-1.79%)	⬇️
packages/core-utils/lib/index.js	100% <100%> (ø)
...ore-api/lib/versions/2/transformers/transaction.js	100% <100%> (ø)	⬆️
packages/core-utils/lib/delegate-calculator.js	100% <100%> (ø)
...s/core-api/lib/versions/1/transformers/delegate.js	100% <100%> (ø)	⬆️
.../versions/2/transformers/utils/format-timestamp.js	0% <0%> (-100%)	⬇️
...base/lib/repositories/utils/delegate-calculator.js	0% <0%> (-90%)	⬇️
... and 6 more

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