docs: rephrase docs and readme

[ghost]

🔗 Linked issue

❓ Type of change

• 📖 Documentation (updates to the documentation or readme)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

Most of the "Getting started" sections contain verbose and redundant sentences, one of them was:

"x is a composable function. Calling that composable function [...]"

I've shortened it while making sure it's understandable enough; I've also proofread and rephrased a lot of sentences on the Basic Usage page and changed nuxt.config file extensions from .js to .ts since the v8 docs it's mainly focused on Nuxt 3.

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.

[BobbieGoede]

Looks like good and needed changes overall!

I agree that the composable descriptions are a bit verbose, but I have to point out that the updated description could cause some confusion.

`useLocalePath` is a composable that returns the localized URL for a given page.

Would be more correct if it were the following:

`useLocalePath` is a composable which returns a function used to get the localized URL for a given page.

Something along those lines, and same goes for the other composables described on that page.

[kazupon]

Thank you for your contribution!
Looks good for me!

Please update the part commented by BobbieGoede on in the review as well. 🙏