Upgrade Holepunch P2P stack and npm dependencies

Align p2ns with current Holepunch ecosystem versions: autopass 3,
hyperdb 6, hyperschema 1.21, hyperdrive 13, corestore 7.10, hyperswarm
4.17, protomux 3.11, and compact-encoding 3 (with npm overrides).
Also bump Tailwind/PostCSS, ws, node-forge, and related tooling; add
express and holesail-logger; remove unused install/npm packages.

Use cache/plugin-spec when plugin spec dirs are not writable, and
update docs and proxy install notes. Rebuild admin CSS for Tailwind 4.3.

Existing P2P storage must be wiped (--clean) after upgrading.

plugin-sites/file.drop/config.json

@@ -2,7 +2,7 @@
   "name": "File Drop",
   "version": "1.0.5",
   "domain": "file.drop",
-  "enabled": true,
+  "enabled": false,
   "description": "Temporary 24-hour file storage with shareable links",
   "author": "P2NS",
   "license": "MIT",