chore(simplification): Simplifying the patches

[Jacobbrewer1]

Describe your changes

This pull request includes several changes to the SQLPatch functionality, focusing on improving code readability, refactoring methods, and updating documentation. The most important changes include removing unused imports, refactoring the loadDiff method, adding a new method to handle embedded structs, and updating test cases to reflect these changes.

Refactoring and Code Simplification:

• loader.go: Refactored the loadDiff method to use a range loop and moved the embedded struct handling logic to a new method handleEmbeddedStruct. [1] [2]
• sql.go: Simplified the patchGen method by introducing helper functions dereferenceIfPointer and ensureStruct, and refactored the loop to use a range loop. [1] [2]

Documentation Updates:

• README.md: Updated the description for includeZeroValues and includeNilValues to reflect that they are used in the Patch method instead of NewDiffSQLPatch.

Test Cases:

• sql_test.go: Updated test cases to reflect changes in the SQLPatch implementation, including changes to expected argument types and values. [1] [2]

Removal of Unused Imports:

• loader.go and sql.go: Removed unused imports to clean up the codebase. [1] [2]