feat: import-pact-file (v2/v3/v4 http)

[YOU54F]

fixes #10

• Validates the following pact formats utilising https://github.com/pactflow/pact-schemas
  • V1
  • V2
  • V3
  • V4
  • ⚠️ currently possible incorrect warnings about valid matchers. Can remove matchers from schema and perform upstream changes later to https://github.com/pactflow/pact-schemas
    • Have now set matchers, matchingRules, generators to be allowed as property keys but provide no validation, and they are removed from the object mapper.
• Processes the following interaction types
  • V2
  • V3 sync/http
  • V3 sync/http
  • V4 sync/http
  • ⚠️ TODO - explicitly detect and ignore incompatible types
    • Will filter out non "Synchronous/HTTP" interaction types for v4 pacts.
• Creates new scoped option --base-uri / -b for user to provide url override when uploading pacts as Pact's do not contain that info
• Creates new scoped option --ignore-pact-schema-verification-result for user to ignore the validation performed against the pact-schemas. The files may, or may not be supported if they fail validation, but allows an escape hatch, just in case it is an issue on our side to fix with the schemas

[YOU54F]

Could do with dry-ing up, but good enough for a review and able to upload all the new pact fixtures to explore

[frankkilcommins]

LGTM - and some of this will already be refactored with adding Pact tests.