Adds Credentials Module

[Juliano1612]

Description

This adds the Credentials Modules, which allows developers to fetch credentials issued on SpruceKit Credential Issuer.
This module requires Storage Module, so you must enable both to make it work.

const ssx = SSX({
  modules: {
    storage: true,
    credentials: true
  }
})

await ssx.signIn();

const { data } = ssx.credentials.list();

Type

• New feature (non-breaking change which adds functionality)

Diligence Checklist

• I added a changelog with all changes I made in this PR
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• I have made corresponding changes to the documentation (if required)
• Any dependent changes have been merged and published in downstream modules

[codecov-commenter]

Codecov Report

Patch coverage: 64.63% and project coverage change: -0.26% ⚠️

Comparison is base (cab5a7e) 79.70% compared to head (0a973a7) 79.44%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #150      +/-   ##
==========================================
- Coverage   79.70%   79.44%   -0.26%     
==========================================
  Files          34       35       +1     
  Lines        4365     4446      +81     
  Branches      252      254       +2     
==========================================
+ Hits         3479     3532      +53     
- Misses        886      914      +28     

Files Changed	Coverage Δ
...kages/ssx-sdk/src/modules/Storage/KeplerStorage.ts	25.52% <11.11%> (-0.35%)	⬇️
packages/ssx-sdk/src/ssx.ts	80.18% <52.17%> (-2.90%)	⬇️
packages/ssx-sdk/src/modules/Credentials.ts	79.59% <79.59%> (ø)
packages/ssx-sdk/src/modules/index.ts	100.00% <100.00%> (ø)

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[skgbafa]

Solid PR