chore: repoint remaining links and host-specific tooling at git.swaits.com

Covers files missed by the first pass (.svelte/.astro components, bare org and
profile links, plugin doc headers), plus content that needed rewriting rather
than a URL swap: the chezmoi bootstrap script now provisions SSH for
git.swaits.com (User git, port 2222) and initialises from Gitea.

Link labels were updated to match their new targets.

README.md

@@ -1,7 +1,7 @@
 # donglora-bridge has moved
 
 This repository has moved to the
-[**donglora** GitHub organization](https://github.com/donglora):
+[**donglora** organization](https://git.swaits.com/donglora):
 
 **[donglora/bridge](https://git.swaits.com/donglora/bridge)**