Docs: remove emojis and tighten the README

[jackspiering]

Description

Cleans up the root README.md so the application list is easier to scan.

• Removes the emojis from the section headings, table headers, and service names.
• Rewrites every description as one short noun phrase. It drops the repeated "A self-hosted…" and filler such as "lightweight" and "highly customizable", and removes claims that the service README does not support.
• Marks archived projects the same way: "Archived." instead of "PROJECT ARCHIVED".
• Renames "Food & wellness" to "Food and wellness". With no emoji, the headings now give plain anchors, so the two <a id> workarounds are gone.
• Moves five misfiled services:
  • Vaultwarden to Networking and security.
  • Forgejo and Gitea to Development tools.
  • File Browser and Gokapi to Productivity and collaboration.
• Moves the table of contents above "Featured by Tailscale", splits Quick Start step 6 into bullets, and shortens the intro, Featured, Contributors, and Contributing text.
• Changes the H1 to "ScaleTail" and corrects "AdGuardHome Sync" to "AdGuard Home Sync".

Related Issues

• None.

Verification

• rumdl 0.2.78, the version linting.yml pins, reports no issues on the whole repository.
• git diff --check origin/main is clean.
• A search for emoji characters in README.md finds none.
• All 123 directories in services/ are linked once, and every table is sorted by name, ignoring case.
• I did not run Compose validation, because no stack changed.

Checklist

• I have performed a self-review of my code and followed the templates structure.
• I have added verification that the stack works as expected.
• I have updated necessary documentation (e.g. frontpage README.md ).
• I ran Compose validation with dummy values for required variables.
• I ran rumdl on the whole repository.
• I committed no working credential.

Additional Context

• Not applicable: no stack changed, so the stack verification and Compose boxes stay unchecked.
• The Vaultwarden, Forgejo, Gitea, File Browser, and Gokapi moves are judgment calls. SearXNG and Tautulli could also move, but I left them.
• Some service README titles differ from the bold names in the list, for example Picard ("MusicBrainz Picard"), Technitium DNS, Hytale, Minecraft, and the Tailscale App Connector and Subnet Router "Node" suffixes. I left them.
• I kept a few claims from the old text that the repository does not confirm: ClipCascade's end-to-end encryption, Copyparty's resumable uploads, Wallos's multi-currency support, and Isley's "cannabis".