feat: generated UI API key management + OAuth-like API Key Flows (#1609)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **New Features**
* API Key Authorization flow with consent screen, callback support, and
a Tools page.
* Schema-driven API Key creation UI with permission presets, templates,
and Developer Authorization Link.
* Effective Permissions preview and a new multi-select permission
control.

* **UI Improvements**
* Mask/toggle API keys, copy-to-clipboard with toasts, improved select
labels, new label styles, tab wrapping, and accordionized color
controls.

* **Documentation**
  * Public guide for the API Key authorization flow and scopes added.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

plugin/source/dynamix.unraid.net/usr/local/emhttp/plugins/dynamix.my.servers/ApiKeyAuthorize.page

@@ -0,0 +1,7 @@
+Menu="WebGui"
+Title="API Key Authorization"
+Icon="icon-u-shield-keyhole"
+Tag="key"
+Cond="false"
+---
+<unraid-api-key-authorize />