Documentation, cognito support, eventstream crash fix

What's Changed

• Fix Docs CI by @TwistedTwigleg in #314
• Document all event-stream-rpc classes by @TwistedTwigleg in #317
• Update documentation for generated models by @TwistedTwigleg in #318
• Add generated headers to Greengrass generated code by @TwistedTwigleg in #319
• Add CI check for code generated files by @TwistedTwigleg in #321
• Use latest versions of SDK by default in samples by @TwistedTwigleg in #322
• Update CRT to pull in Cognito binding and eventstream crash fix by @bretambrose in #324

Full Changelog: v1.10.3...v1.10.4