docs: README.md

[bkrukowski]

Summary by Sourcery

Update the README.md to provide more comprehensive guidance on creating slices and correct a typo.

Documentation:

• Expand the README.md to include detailed instructions on creating slices, including using empty slices, initializing with elements, and creating with predefined capacity.
• Correct a minor typo in the README.md related to index-bound checks.

[sourcery-ai]

Reviewer's Guide by Sourcery

This PR updates the README.md file to improve documentation clarity and organization, particularly in the section about creating slices. The changes include better formatting, more detailed examples, and the addition of new documentation for slice creation patterns and utility methods.

No diagrams generated as the changes look simple and do not need a visual representation.

File-Level Changes

Change	Details	Files
Reorganized and expanded the slice creation documentation section	Split slice creation documentation into distinct subsections with clear headings Added new example for creating an empty slice Added new example for initializing with elements Added new section about creating slices with predefined capacity Updated code examples to be more practical and demonstrative	README.md
Fixed typos and improved feature descriptions	Corrected 'index-bound' to 'index-bounds' in features list Added documentation for the 'Empty()' utility method	README.md

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[sourcery-ai]

Hey @bkrukowski - I've reviewed your changes and they look great!

Here's what I looked at during the review

• 🟢 General issues: all looks good
• 🟢 Security: all looks good
• 🟢 Testing: all looks good
• 🟢 Complexity: all looks good
• 🟢 Documentation: all looks good

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