feat: add format validation

[tatomyr]

What/Why/How?

Added JSON Schema format validation.

Reference

Resolves #766

Testing

• Add an e2e test.
• Test in the browser env

Screenshots (optional)

Check yourself

• Code changed? - Tested with redoc/reference-docs/workflows (internal)
• All new/updated code is covered with tests
• New package installed? - Tested in different environments (browser/node)

Security

• Security impact of change has been considered
• Code follows company security practices and guidelines

[changeset-bot]

🦋 Changeset detected

Latest commit: 9e82900

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 2 packages

Name	Type
@redocly/openapi-core	Minor
@redocly/cli	Minor

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Click here if you're a maintainer who wants to add another changeset to this PR

[github-actions]

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
redocly lint packages/core/src/benchmark/benches/rebilly.yaml	973.6 ± 48.8	934.8	1096.5	1.00 ± 0.05
redocly-next lint packages/core/src/benchmark/benches/rebilly.yaml	970.4 ± 12.2	953.9	994.2	1.00

[github-actions]

Coverage report

St.❔	Category	Percentage	Covered / Total
🟡	Statements	78.67%	5057/6428
🟡	Branches	67.29%	2055/3054
🟡	Functions	73.23%	837/1143
🟡	Lines	78.96%	4769/6040

Test suite run success

836 tests passing in 122 suites.

Report generated by 🧪jest coverage report action from 9e82900