Create an RFC for the SDK and protocol where we can capture FF with events

[bruno-garcia]

[billyvg]

Javascript SDK:

• feat(flags): Add featureFlagsIntegration for custom tracking of flag evaluations sentry-javascript#14582
• feat(flags): Adds LaunchDarkly and OpenFeature integrations sentry-javascript#14207

Python SDK:

• feat(flags): Add integration for custom tracking of flag evaluations sentry-python#3860
• Add LaunchDarkly and OpenFeature integration sentry-python#3648