docs: fixed docs errors and major typos

[intls]

Various typos and grammatical errors in the documentation have been corrected to enhance readability and clarity. These improvements ensure that the text is clean, accurate, and user-friendly, providing a better experience for both users and developers. The revised documentation aims to present information more effectively, supporting easier navigation and comprehension of the content.

[CLAassistant]

All committers have signed the CLA.

[intls]

Hey Devs! My Pull Request is ready for review and merge! Thanks! @calldelegation

[fuel-cla-bot[bot]]

Thanks for the contribution! Before we can merge this, we need @intls to sign the Fuel Labs Contributor License Agreement.