feat(core-types): allow inline @context for Credentials and Presentations

[mirceanis]

What issue is this PR fixing

fixes #1073

What is being changed

This PR defines a data type for @context properties to include inline objects too, besides strings and string arrays.

Quality

Check all that apply:

• I want these changes to be integrated
• I successfully ran pnpm i, pnpm build, pnpm test, pnpm test:browser locally.
• I allow my PR to be updated by the reviewers (to speed up the review process).
• I added unit tests.
• I added integration tests.

[codecov]

Codecov Report

Base: 80.25% // Head: 85.21% // Increases project coverage by +4.96% 🎉

Coverage data is based on head (5e95da9) compared to base (125bf42).
Patch coverage: 82.61% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             next    #1119      +/-   ##
==========================================
+ Coverage   80.25%   85.21%   +4.96%     
==========================================
  Files         118      145      +27     
  Lines        4056    14891   +10835     
  Branches      875     1550     +675     
==========================================
+ Hits         3255    12690    +9435     
- Misses        798     2201    +1403     
+ Partials        3        0       -3     

Impacted Files	Coverage Δ
packages/core-types/src/coreEvents.ts	100.00% <ø> (ø)
...s/credential-ld/src/module-types/jsonld/index.d.ts	0.00% <0.00%> (ø)
packages/data-store-json/src/types.ts	0.00% <0.00%> (ø)
packages/did-comm/src/message-handler.ts	72.10% <ø> (+12.64%)	⬆️
.../protocols/coordinate-mediation-message-handler.ts	89.63% <ø> (ø)
packages/did-comm/src/protocols/index.ts	100.00% <ø> (ø)
...omm/src/protocols/messagepickup-message-handler.ts	91.25% <ø> (ø)
.../did-comm/src/protocols/routing-message-handler.ts	89.65% <ø> (ø)
...d-comm/src/protocols/trust-ping-message-handler.ts	89.02% <ø> (ø)
packages/did-comm/src/transports/transports.ts	95.23% <ø> (+8.87%)	⬆️
... and 215 more

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