chore: remove .DS_Store files and improve documentation

[cdragos]

Description

I've made a couple of housekeeping changes in this PR:

1. Cleaned up some pesky .DS_Store files that were hanging around
2. Did some touch-ups on our docs:
   • Fixed a grammar hiccup in the "Library Structure" section
   • Corrected the "discuss.roboflow.com" URL (oops!)
   • Tidied up the HTML for our social media icons at the bottom

Type of change

Please delete options that are not relevant.

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] This change requires a documentation update

Docs

• [x] Docs updated? What were the changes:

• Corrected some grammatical issues

• Fixed typo in the "discuss.roboflow.com" URL

• Improved HTML structure for social media icons

[cdragos]

@iurisilvio Could you please review this PR when you have a moment? Thanks!

[iurisilvio]

Thanks! 🚢

[cdragos]

@iurisilvio

Thanks! 🚢

@iurisilvio

Thanks for the approve! I don’t have the rights to merge this PR.