Update useKindeAuth to new implementation with deprecation warning

[dtoxvanilla1991]

Explain your changes

Update the useKindeAuth function to point to the new useKindeBrowserClient implementation and add a deprecation warning. This change prepares for the eventual removal of useKindeAuth in a future major version.

Breaking changes
None. useKindeAuth() returns the same KindeState type as before - it just works now.

Checklist

• I have read the “Pull requests” section in the contributing guidelines.
• I agree to the terms within the code of conduct.

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

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Walkthrough

Adds an exported flagDataTypeMap mapping s -> "string", i -> "integer", b -> "boolean", j -> "json" to the feature-flag factory; introduces a deprecated useKindeAuth wrapper that warns once and forwards to useKindeBrowserClient; updates src/frontend/index.js to export from the new wrapper.

Changes

Cohort / File(s)	Summary
Deprecation wrapper & index export src/frontend/useKindeAuth.ts, src/frontend/index.js	Adds useKindeAuth as a deprecated wrapper around useKindeBrowserClient that emits a one-time console warning; updates src/frontend/index.js to export useKindeAuth from the new module (removes previous OldAuthProvider.jsx export).
Feature flag type map src/frontend/factories/feature-flag-factory.ts	Exports new flagDataTypeMap: Record<KindeFlagTypeCode, KindeFlagTypeValue> with mappings s: "string", i: "integer", b: "boolean", j: "json" and imports KindeFlagTypeValue for typing; getFlagFactory uses the local map for type resolution and errors.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

🚥 Pre-merge checks | ✅ 4

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely summarizes the main change: updating useKindeAuth to use a new implementation with a deprecation warning.
Description check	✅ Passed	The description is directly related to the changeset, explaining the motivation for updating useKindeAuth and confirming no breaking changes.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Merge Conflict Detection	✅ Passed	✅ No merge conflicts detected when merging into main

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• Post copyable unit tests in a comment

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[coderabbitai]

Actionable comments posted: 1

🤖 Fix all issues with AI agents

In `@src/frontend/factories/feature-flag-factory.ts`:
- Around line 5-10: The flagDataTypeMap constant is missing the "j" key required
by the KindeFlagTypeCode union; update flagDataTypeMap to include j: "json" so
it satisfies Record<KindeFlagTypeCode, KindeFlagTypeValue> (i.e., add the "j"
entry to the exported flagDataTypeMap object to match the
KindeFlagTypeCode/"b"|"i"|"s"|"j" and KindeFlagTypeValue types).

[DanielRivers]

@coderabbitai review

[coderabbitai]

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