Setup Prettier to format code

[davidyuk]

This PR is supported by the Æternity Foundation

[codecov]

Codecov Report

Attention: Patch coverage is 71.09208% with 135 lines in your changes missing coverage. Please review.

Project coverage is 82.92%. Comparing base (58e3f43) to head (c664255).
Report is 7 commits behind head on develop.

Files with missing lines	Patch %	Lines
src/contract/Contract.ts	44.68%	25 Missing and 1 partial ⚠️
src/aepp-wallet-communication/wallet-detector.ts	0.00%	10 Missing ⚠️
src/account/Generalized.ts	43.75%	8 Missing and 1 partial ⚠️
src/tx/builder/helpers.ts	46.66%	4 Missing and 4 partials ⚠️
src/chain.ts	63.15%	3 Missing and 4 partials ⚠️
src/aepp-wallet-communication/connection-proxy.ts	14.28%	6 Missing ⚠️
src/contract/compiler/Cli.ts	50.00%	5 Missing ⚠️
src/AeSdkBase.ts	63.63%	2 Missing and 2 partials ⚠️
src/account/Ledger.ts	20.00%	0 Missing and 4 partials ⚠️
...p-wallet-communication/WalletConnectorFrameBase.ts	20.00%	4 Missing ⚠️
... and 32 more

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2022      +/-   ##
===========================================
- Coverage    90.23%   82.92%   -7.32%     
===========================================
  Files          109      109              
  Lines         3574     3625      +51     
  Branches       736      751      +15     
===========================================
- Hits          3225     3006     -219     
- Misses         333      524     +191     
- Partials        16       95      +79     

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