refactor: extract jest matchers into its own package

[faustbrian]

Proposed changes

Resolves #1907

Extracting the matchers into its own package allows the use of those matchers in other TS/JS projects without all the clutter that is specific to only core.

Types of changes

• New feature (non-breaking change which adds functionality)
• Refactoring (improve a current implementation without adding a new feature or fixing a bug)

Checklist

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

[codecov-io]

Codecov Report

Merging #1926 into develop will decrease coverage by 0.19%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           develop    #1926     +/-   ##
==========================================
- Coverage    39.55%   39.35%   -0.2%     
==========================================
  Files          350      350             
  Lines         7622     7622             
  Branches      1156     1163      +7     
==========================================
- Hits          3015     3000     -15     
- Misses        4593     4607     +14     
- Partials        14       15      +1

Impacted Files	Coverage Δ
.../core-jest-matchers/src/transactions/types/ipfs.ts	80% <ø> (ø)
...e-jest-matchers/src/blockchain/execute-on-entry.ts	75% <ø> (ø)
packages/core-jest-matchers/src/api/peer.ts	0% <ø> (ø)
packages/core-jest-matchers/src/api/block.ts	0% <ø> (ø)
...kages/core-jest-matchers/src/transactions/valid.ts	75% <ø> (ø)
...matchers/src/transactions/types/multi-signature.ts	80% <ø> (ø)
...kages/core-jest-matchers/src/models/transaction.ts	85.71% <ø> (ø)
...e-jest-matchers/src/transactions/types/transfer.ts	80% <ø> (ø)
packages/core-jest-matchers/src/models/delegate.ts	80% <ø> (ø)
...e-jest-matchers/src/transactions/types/delegate.ts	80% <ø> (ø)
... and 17 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update d7bb3b6...cb3949b. Read the comment docs.