Improve documentations #5

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Pull Request Overview

This PR improves the project documentation and usage examples for the "nice" package by adding detailed instructions and an updated error handling example using throw and catch patterns.

• Added package documentation comment in nice.go
• Expanded README.md with usage instructions and a revised code example for error handling

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
nice.go	Added package-level comment to explain the package role
README.md	Added usage instructions and revised the error handling example

Comments suppressed due to low confidence (2)

README.md:47

• [nitpick] The variable name 'err2Handle' can be unclear. Consider renaming it to a more descriptive name such as 'errorToHandle' to improve readability.

var err2Handle = errors.New("error to handle")

README.md:52

• The example uses log.Printf but does not import the 'log' package. Please add an import statement for 'log' to ensure the snippet compiles.

log.Printf("An error has happened: %v", err)

## Pull Request Overview This PR improves the project documentation and usage examples for the "nice" package by adding detailed instructions and an updated error handling example using throw and catch patterns. - Added package documentation comment in nice.go - Expanded README.md with usage instructions and a revised code example for error handling ### Reviewed Changes Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments. | File | Description | | ------------ | ------------------------------------------------------- | | nice.go | Added package-level comment to explain the package role | | README.md | Added usage instructions and revised the error handling example | <details> <summary>Comments suppressed due to low confidence (2)</summary> **README.md:47** * [nitpick] The variable name 'err2Handle' can be unclear. Consider renaming it to a more descriptive name such as 'errorToHandle' to improve readability. ``` var err2Handle = errors.New("error to handle") ``` **README.md:52** * The example uses log.Printf but does not import the 'log' package. Please add an import statement for 'log' to ensure the snippet compiles. ``` log.Printf("An error has happened: %v", err) ``` </details>