CLDR-19493 docs: fix typos, grammar, and formatting in README.md

[younies]

Proofread and cleaned up README.md to improve documentation quality and accuracy.

Key changes:

• Corrected spelling typos (e.g., "projectis" -> "project is", "explict" -> "explicit", "verfier" -> "verifier").
• Fixed grammatical issues, including completing an unfinished sentence about ICU version specifications.
• Updated legacy directory and path references (e.g., "testResults") to align with the actual "testOutput" and "testReports" directories defined in the codebase.
• Standardized markdown formatting by adding backticks to file paths, variables, and commands for better readability.

[gemini-code-assist]

Code Review

This pull request focuses on improving the documentation in the README.md file by correcting numerous typos, enhancing grammatical clarity, and standardizing formatting. Key updates include the consistent use of backticks for filenames, variables, and command-line arguments, as well as clarifying instructions for installation and execution. Since no review comments were provided, I have no additional feedback to offer.