feat(metadata): add CLI validation with URL-based schema loading#819

Aaron ("AJ") Steers (aaronsteers) wants to merge 4 commits intodevin/1760999875-add-metadata-modelsairbytehq/airbyte-python-cdk:devin/1760999875-add-metadata-modelsfrom

vendor-metadata-yaml-and-add-cliairbytehq/airbyte-python-cdk:vendor-metadata-yaml-and-add-cliCopy head branch name to clipboard