Add `dataCollection` option type and deprecate `sendDefaultPii`

[antonis]

Add the new dataCollection option to ReactNativeOptions with the relevant subset of options from the spec.

Tasks

• Define DataCollectionOptions type with at minimum: userInfo, genAIInputs, genAIOutputs, stackFrameVariables, frameContextLines
• Add dataCollection to ReactNativeOptions in options.ts
• Deprecate sendDefaultPii with a JSDoc @deprecated annotation
• Add backward-compat bridging: if sendDefaultPii is set but dataCollection is not, map sendDefaultPii: true → dataCollection: { userInfo: true }
• Emit a console warning when sendDefaultPii is used, pointing to dataCollection
• Add tests for the bridging logic

References

• packages/core/src/js/options.ts — option definitions
• Spec: https://develop.sentry.dev/sdk/foundations/client/data-collection/

[linear-code]

RN-579