Add highestBid object to listVaults, getVault and listAuctions RPCs

[jingyi2811]

What kind of PR is this?:

/kind fix

What this PR does / why we need it:

If an auction bid is made, display highestBid object that is returned from listVaults, getVault and listAuctions RPCs

Which issue(s) does this PR fixes?:

Fixes #

Additional comments?:

[codeclimate]

Code Climate has analyzed commit 21fdb6e and detected 0 issues on this pull request.

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[codecov]

Codecov Report

Merging #850 (21fdb6e) into main (7c7231a) will increase coverage by 1.10%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #850      +/-   ##
==========================================
+ Coverage   95.21%   96.32%   +1.10%     
==========================================
  Files         140      140              
  Lines        4470     4485      +15     
  Branches      585      586       +1     
==========================================
+ Hits         4256     4320      +64     
+ Misses        214      165      -49     

Impacted Files	Coverage Δ
packages/jellyfish-api-core/src/category/loan.ts	100.00% <ø> (ø)
packages/jellyfish-crypto/src/elliptic.ts	81.81% <0.00%> (-12.13%)	⬇️
...ellyfish-transaction/src/script/dftx/dftx_token.ts	93.02% <0.00%> (-6.98%)	⬇️
packages/jellyfish-crypto/src/der.ts	92.59% <0.00%> (-3.71%)	⬇️
...ages/jellyfish-transaction/src/script/dftx/dftx.ts	95.45% <0.00%> (-1.47%)	⬇️
...ckages/jellyfish-transaction/src/script/mapping.ts	95.27% <0.00%> (-1.31%)	⬇️
...ellyfish-transaction/src/script/dftx/dftx_loans.ts	100.00% <0.00%> (ø)
...jellyfish-transaction/src/script/dftx/dftx_pool.ts	80.00% <0.00%> (+2.50%)	⬆️
...transaction-builder/src/txn/txn_builder_oracles.ts	100.00% <0.00%> (+6.25%)	⬆️
...ish-transaction/src/script/dftx/dftx_governance.ts	100.00% <0.00%> (+8.13%)	⬆️
... and 5 more

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