This PR addresses various typos, spelling errors, and grammar issues throughout the README.md file to improve readability and professionalism. The changes are surgical and focused, preserving the original structure and meaning while enhancing text quality.

Key improvements made:

Spelling and Typo Fixes:

• Fixed "pasesed" → "passed" in stream trimming documentation
• Fixed "Seta specific" → "Set a specific" in expiration documentation
• Fixed "user the ACL" → "use the ACL" in ACL command notes
• Corrected missing semicolon in PHP code example

Grammar and Clarity Enhancements:

• Improved verb agreement: "it used as persistent id" → "it is used as persistent id"
• Fixed verb form: "then working like" → "then work like"
• Corrected preposition: "in the event on an error" → "in the event of an error"
• Added missing articles: "Following INI variables" → "The following INI variables"
• Enhanced sentence structure for better flow and readability

Consistency Improvements:

• Standardized Redis capitalization throughout the document
• Simplified wordy phrases: "in order to" → "to" where appropriate
• Normalized spacing after sentences for consistent formatting
• Improved punctuation and comma placement

The changes span 25 lines across the 4500+ line README, focusing on the most impactful improvements while maintaining the document's comprehensive technical content and structure. No markdown formatting was altered—only text content was improved.

Fixes #2712.

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