Add more examples for compatible drivers and refactor readme

[murfffi]

No description provided.

[gemini-code-assist]

Summary of Changes

Hello @murfffi, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request primarily focuses on enhancing the usqlgen project's documentation by expanding the list of compatible database/sql drivers and clarifying various aspects of its usage. The changes aim to make it easier for users to understand how to leverage usqlgen with different database systems and troubleshoot common issues, ultimately improving the user experience and reducing potential friction during setup.

Highlights

• Documentation Enhancement: The README.md has been significantly updated to provide clearer explanations and more comprehensive examples for usqlgen.
• Expanded Driver Examples: A new section, 'Tested drivers', has been added to showcase a wider range of compatible database/sql drivers, including Cloudflare D1, TDEngine, ImmuDB, Oracle, and IBM DB2.
• Improved Clarity and Troubleshooting: Explanations for usqlgen's core functionality, CGO usage, and potential compilation errors (including those related to native driver dependencies) have been refined for better understanding.

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[gemini-code-assist]

Code Review

This pull request does a great job of refactoring the README to improve clarity and provide more comprehensive examples for using usqlgen. The restructuring makes the document easier to follow, and the new examples of compatible drivers, along with explanations for their use cases, add significant value for users. The added troubleshooting tips for compilation errors are also a welcome addition.

I've found a couple of minor typos and grammatical points that could be polished, which I've noted in the line comments. Overall, this is a solid improvement to the project's documentation.