fix(jellyfish-api-core): add hex field in AccountOwner interface

[cwkang1998]

What this PR does / why we need it:

As stated in the issue given, the account owner is missing the hex field. This PR adds it as a non-optional field.

Which issue(s) does this PR fixes?:

Fixes #1075

[codeclimate]

Code Climate has analyzed commit 88cc1d8 and detected 0 issues on this pull request.

View more on Code Climate.

[codecov]

Codecov Report

Merging #1083 (88cc1d8) into main (e2d0002) will decrease coverage by 0.32%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #1083      +/-   ##
==========================================
- Coverage   95.54%   95.21%   -0.33%     
==========================================
  Files         168      169       +1     
  Lines        5007     5039      +32     
  Branches      654      657       +3     
==========================================
+ Hits         4784     4798      +14     
- Misses        215      230      +15     
- Partials        8       11       +3     

Impacted Files	Coverage Δ
...ackages/jellyfish-api-core/src/category/account.ts	100.00% <ø> (ø)
...ish-transaction-builder/src/txn/txn_builder_dex.ts	71.42% <0.00%> (-28.58%)	⬇️
...action-builder/src/txn/txn_builder_icxorderbook.ts	71.42% <0.00%> (-28.58%)	⬇️
...jellyfish-transaction/src/script/dftx/dftx_pool.ts	77.50% <0.00%> (-22.50%)	⬇️
...ontainers/src/containers/RegTestContainer/index.ts	87.50% <0.00%> (-12.50%)	⬇️
packages/jellyfish-api-core/src/category/spv.ts	76.74% <0.00%> (-9.31%)	⬇️
packages/jellyfish-api-core/src/category/oracle.ts	90.90% <0.00%> (-9.10%)	⬇️
packages/jellyfish-api-core/src/category/loan.ts	93.93% <0.00%> (-6.07%)	⬇️
...h-transaction-builder/src/txn/txn_builder_loans.ts	84.84% <0.00%> (-3.04%)	⬇️
...ages/jellyfish-transaction/src/script/dftx/dftx.ts	96.96% <0.00%> (-1.52%)	⬇️
... and 10 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 e2d0002...88cc1d8. Read the comment docs.

[netlify]

✔️ Deploy Preview for jellyfish-defi ready!

🔨 Explore the source changes: 88cc1d8

🔍 Inspect the deploy log: https://app.netlify.com/sites/jellyfish-defi/deploys/621485affdb3a3000730b7ec

😎 Browse the preview: https://deploy-preview-1083--jellyfish-defi.netlify.app

[surangap]

update the tests also