Fix console logging in production and improve type safety

[jamespepper81]

This pull request introduces a few targeted improvements and refinements to the Metro bundler configuration and the Replace-By-Fee (RBF) transaction logic. The most notable changes are the addition of a configurable minimum RBF fee increase rate, improved type safety, and enhanced Metro config clarity and logging.

RBF Transaction Logic Improvements:

• Introduced a MIN_RBF_FEE_INCREASE_RATE constant to define the minimum required fee increase for RBF transactions, replacing hardcoded values for better maintainability and clarity. [1] [2]
• Improved type safety in the RBFValidationResult interface by specifying originalTx as a Transaction type instead of any.
• Removed unnecessary console logging from the ECC library validation function for cleaner output.

Metro Bundler Configuration Enhancements:

• Explicitly configured supported platforms for module resolution in the Metro config, making platform support clearer and more maintainable.
• Added conditional request logging in the Metro server middleware for improved debugging during development, and clarified transformer configuration comments.