Fix various typos and grammatical errors in README.md

[palenciavik]

This PR addresses multiple small typos and grammatical errors in the main README.md as well as some improvements in phrasing for clarity.

Corrections include:

• Fixed subject-verb agreement errors (e.g., "implementation requires" -> "implementations require", "this tool use" -> "this tool uses").
• Corrected verb forms and pluralization (e.g., "downloaded" -> "download", "two value" -> "two values").
• Fixed punctuation, such as removing a double period ("memory..")
• Improved possessive phrasing for "Transformers" to be more natural.