Implement decoding of channel state

[davidyuk]

depends on #1736
related to #1619
found issues aeternity/protocol#505 aeternity/protocol#506 aeternity/protocol#507 aeternity/protocol#508

This PR is supported by the Æternity Crypto Foundation

[github-advanced-security]

CodeQL found more than 10 potential problems in the proposed changes. Check the Files changed tab for more details.

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (develop@72d0cd5). Click here to learn what that means.
Patch coverage: 78.78% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             develop    #1737   +/-   ##
==========================================
  Coverage           ?   82.39%           
==========================================
  Files              ?       87           
  Lines              ?     2987           
  Branches           ?      577           
==========================================
  Hits               ?     2461           
  Misses             ?      247           
  Partials           ?      279           

Impacted Files	Coverage Δ
src/tx/builder/field-types/array.ts	100.00% <ø> (ø)
src/tx/builder/field-types/entry.ts	91.66% <ø> (ø)
src/tx/builder/field-types/mptree.ts	80.80% <ø> (ø)
src/channel/Contract.ts	79.45% <50.00%> (ø)
src/tx/builder/field-types/short-u-int-const.ts	66.66% <50.00%> (ø)
src/tx/validator.ts	85.43% <57.14%> (ø)
src/channel/Base.ts	76.59% <66.66%> (ø)
src/tx/builder/field-types/fee.ts	91.48% <66.66%> (ø)
src/tx/builder/field-types/wrapped.ts	66.66% <66.66%> (ø)
src/tx/builder/index.ts	90.00% <83.33%> (ø)
... and 3 more

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