Subschema improvements (part 1)

[perher]

First set of subschema improvements taken from #473

• Adds support for properties on allOf/anyOf types (Fixes v0.18.0 combination of anyof and required loses all information about object #431)
• Support for subschemas using external refs
• Support for subschemas when types are across different go packages

[codecov]

Codecov Report

❌ Patch coverage is 10.48951% with 512 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (main@4b5de3c). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
tests/data/core/anyOf/anyOfMultipleRequired.go	0.00%	124 Missing ⚠️
tests/data/core/allOf/allOfMultipleRequired.go	0.00%	118 Missing ⚠️
tests/data/core/anyOf/anyOfWithDirectProperties.go	0.00%	86 Missing ⚠️
tests/data/core/anyOf/anyOf.ref.go	0.00%	80 Missing ⚠️
tests/data/core/allOf/allOfWithDirectProperties.go	0.00%	76 Missing ⚠️
pkg/schemas/model.go	70.00%	10 Missing and 5 partials ⚠️
pkg/generator/schema_generator.go	70.58%	6 Missing and 4 partials ⚠️
pkg/schemas/types.go	25.00%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #480   +/-   ##
=======================================
  Coverage        ?   39.59%           
=======================================
  Files           ?       66           
  Lines           ?     7147           
  Branches        ?        0           
=======================================
  Hits            ?     2830           
  Misses          ?     4039           
  Partials        ?      278           

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[perher]

Hey @omissis I've extracted first set of changes from my mega PR #473, to make review easier.

Let me know if you want me to split this out further.

[omissis]

oh, thank you! I was rebasing and fixiing conflicts in #473 and I wanted to push, but I guess this works well, too :)

[perher]

oh, thank you! I was rebasing and fixiing conflicts in #473 and I wanted to push, but I guess this works well, too :)

Thank you for following up on this! feel free to push to either this or #473 as you wish

[omissis]

yeah I think I will start with this one, thanks!