Fix typos and grammatical errors across multiple documentation files

[Dimitrolito]

This pull request fixes several typographical and grammatical issues across various documentation files in the project. Changes include the correction of articles ("a" vs. "an") and clarification of phrases for improved readability and accuracy.

Motivation and Context:

These changes were made to address typos and ensure consistency in grammar, which helps improve the clarity and professionalism of the documentation. Some issues included the incorrect use of articles and repetitive phrases, which could confuse readers.

Changes:

• Fixed the use of "a" vs. "an" where appropriate (e.g., "a Uniswap V3 Pool" → "an Uniswap V3 Pool").
• Removed repetitive phrases (e.g., "when users when users" → "when users").
• Corrected other minor typographical errors for clarity.

Impact:

These changes are purely grammatical and will not affect the functionality of the codebase. They help improve the documentation and ensure consistency throughout.

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I added a changeset to account for this change.

Reviewer Checklist:

• My review includes a synopsis of the changes and potential issues.
• The code style is enforced.
• There are no risky or concerning changes in the PR.