docs: serious grammar and spelling errors

[antews]

🎯 Problem to be solved

The current documentation contains grammatical and spelling errors, as well as typos, which may hinder understanding and reduce the overall quality of the documentation. It is important to correct these errors to improve clarity and professionalism. Closes #431

• Link to the codebase issue that prompted this docs change

🛠️ Proposed solution

Implement corrections in the documentation to eliminate the identified grammatical and spelling errors. This includes:

1. Correcting typos and misspelled words.

2. Fixing grammatical errors such as incorrect verb tenses, missing articles, and punctuation mistakes.

3. Enhancing sentence structure for better clarity.

• For major overhaul of docs, design doc link:

🧪 Tests

• Netlify deployment build tests passing

👐 Additional acceptance criteria

❌ Out of Scope