Update README.md

[qiracy]

Description

• Centered the description
• Removed go through since the list of lists is already the first thing mentioned in site hunting and reformatted that sentence to make more sense
• Fixed a markdown error in emoji legend (missing *)
• Made emoji legend consistent in size and style with everything else
• Changed the emoji for "Follow" to make more sense since you're essentially gonna be following all of those for wiki notifs (hence why the bell fits better here)
• Swapped the order between emoji legend and contribute so Wiki + Emoji legend (information) is one under another and then Contribute and Follow (actions user can take) are close together
• Reverted the change that removed icons for dc, gh and bsky. It's intuitive enough and looks way better than having it just written out next to each other. Everyone knows what those icons represent, your cursor changes when you hover over them to indicate you can click on them, and it goes well with the style of the wiki since we recently implemented dc/gh icons

Context

This change improves the overall style and consistency of the README.md and fixes some markdown/grammar issues.

Types of changes

• Bad / Deleted sites removal
• Grammar / Markdown fixes
• Content addition (sites, projects, tools, etc.)
• New Wiki section

Checklist:

• I have read the contribution guide.
• I have made sure to search before making any changes.
• My code follows the code style of this project.