chore: simplify plugin readmes, changelogs and manifest descriptions

plugins/wake-on-lan/README.md

@@ -0,0 +1,35 @@
+# Wake-on-LAN
+
+Wake a sleeping host by sending a Wake-on-LAN packet to its MAC address.
+
+## Features
+
+- Wake a sleeping host by sending a Wake-on-LAN packet to its MAC address.
+- Automations can wake a host as one of their steps.
+
+## Settings
+
+### Host
+
+- MAC address: the network card to wake.
+- Broadcast address: where to send the packet.
+
+## Permissions
+
+- `wake-on-lan.send`: Send Wake-on-LAN packets. Admins and users have it by default.
+
+## Services
+
+Provides to other plugins:
+
+- `wake-on-lan.send`: wake a host.
+
+## Development
+
+```bash
+npm run build      # build into dist/
+npm run test       # run this plugin's tests
+npm run typecheck  # type-check this plugin
+```
+
+See `packages/plugin-sdk/ARCHITECTURE.md` for the plugin contract.