feat(jellyfish-api-core): add encryptWallet, walletPassphrase, walletPassphraseChange, walletLock RPC

[shancht]

What this PR does / why we need it:
/kind feature

Which issue(s) does this PR fixes?:
Fixes part of #48 by adding encryptWallet() & walletPassphrase().

encryptWallet() allows the encryption of wallet for the first time using a custom ‘passphrase’. Transactions and calls related to private keys will thereafter require a passphrase before execution.

walletPassphrase() stores the wallet decryption key in memory for ‘timeout’ seconds. Calling 'walletpassphrase' when wallet is unlocked will set a new unlock time that overrides the old setting.

Additional comments?:
Primary purpose is to add a layer of security towards the wallet in storing of private keys.

[codeclimate]

Code Climate has analyzed commit a2c61fb and detected 1 issue on this pull request.

Here's the issue category breakdown:

Category	Count
Complexity	1

View more on Code Climate.

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[codecov]

Codecov Report

Base: 90.74% // Head: 89.10% // Decreases project coverage by -1.64% ⚠️

Coverage data is based on head (a765dde) compared to base (3aeeb67).
Patch coverage: 75.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1969      +/-   ##
==========================================
- Coverage   90.74%   89.10%   -1.64%     
==========================================
  Files         367      363       -4     
  Lines       10771    11027     +256     
  Branches     1376     1439      +63     
==========================================
+ Hits         9774     9826      +52     
- Misses        952     1146     +194     
- Partials       45       55      +10     

Impacted Files	Coverage Δ
packages/jellyfish-api-core/src/category/wallet.ts	87.62% <75.00%> (-12.38%)	⬇️
...hale-api/src/module.api/legacy.subgraph.service.ts	16.12% <0.00%> (-70.17%)	⬇️
apps/whale-api/src/module.api/stats.controller.ts	29.00% <0.00%> (-67.94%)	⬇️
apps/libs/caches/src/LegacyCache.ts	33.33% <0.00%> (-66.67%)	⬇️
...yfish-transaction/src/script/dftx/dftx_unmapped.ts	33.33% <0.00%> (-66.67%)	⬇️
apps/whale-api/src/module.api/legacy.controller.ts	36.84% <0.00%> (-63.16%)	⬇️
.../whale-api/src/module.api/poolpair.fees.service.ts	61.11% <0.00%> (-38.89%)	⬇️
...nsaction-builder/src/txn/txn_builder_governance.ts	41.37% <0.00%> (-37.94%)	⬇️
...core/src/saga/AddressParser/dftx/AccountToUtxos.ts	62.50% <0.00%> (-37.50%)	⬇️
packages/jellyfish-api-core/src/category/misc.ts	66.66% <0.00%> (-33.34%)	⬇️
... and 116 more

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[github-actions]

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• ghcr.io/jellyfishsdk/legacy-api:66b16a8571f43843f33b6332ab2c72e720b7acbc
• ghcr.io/jellyfishsdk/playground-api:66b16a8571f43843f33b6332ab2c72e720b7acbc
• ghcr.io/jellyfishsdk/status-api:66b16a8571f43843f33b6332ab2c72e720b7acbc
• ghcr.io/jellyfishsdk/whale-api:66b16a8571f43843f33b6332ab2c72e720b7acbc