Fix Crypto Polyfill, Update Links, Refactor Code, and Improve Android SDK Guidance

[sahilkakwani9]

Problem Statement

1. The crypto-browserify polyfill was causing compilation errors and lacks active maintenance.
2. Several hyperlinks within the lesson content were broken.
3. Code snippets used for demonstration required refactoring for improved functionality and readability.
4. The lesson lacked comprehensive troubleshooting guidance for Android SDK issues.
5. The buffer polyfill's placement in the entry file led to compilation errors.

Summary of Changes

1. Implemented react-native-quick-crypto for native crypto polyfilling, ensuring active maintenance and better performance.
2. Updated and verified all hyperlinks to ensure proper functionality.
3. Refactored code snippets to incorporate robust error handling using try-catch blocks.
4. Added a troubleshooting section addressing NDK unavailability on client machines.
5. Updated babel.config.js with necessary configurations to support new implementations.
6. Reorganized polyfill code into a separate file for improved code organization and imported it at the top of the entry file.
7. Introduced yarn scripts for streamlined package installation.

Additional Notes

• These changes aim to enhance the overall quality, reliability, and user experience of the lesson.
• The refactoring and additions should make the content more accessible and easier to follow for learners.
• I've run this lab locally and ensured compatibility with the latest development environments and best practices.

[mikemaccana]

This has many useful bits especially around the Android SDK but needs significant changes to be merged. In particular, not using metaplex-foundation/js is one of the reasons this bounty was created. See the comments inline.

If those are fixed, however, we can get this in.

Please do not open a 3rd PR. Just update your branch with the fixes so we can see them being fixed here.

[mikemaccana]

'Does not equal -1' is very old-style JS. Why not do const nftOfTheDay = loadedNFTs.find((loadedNft) => { ... }) and then if ( ! loadedNft ) {}?

[sahilkakwani9]

but that will make the condition false

[mikemaccana]

What is a cid? Don't answer, just name this better. See https://github.com/solana-foundation/developer-content/blob/main/CONTRIBUTING.md#code re: use full names.