chore: Move remaining auth methods to plugins (#4900)

* Move Google, Email, and Azure to plugins

* Move OIDC provider, remove old loading code

* Move AuthLogo to plugin

* AuthLogo -> PluginIcon

* Lazy load plugin settings

app/components/PluginIcon.tsx

@@ -0,0 +1,35 @@
+import * as React from "react";
+import styled from "styled-components";
+import PluginLoader from "~/utils/PluginLoader";
+
+type Props = {
+  id: string;
+  size?: number;
+  color?: string;
+};
+
+function PluginIcon({ id, color, size = 24 }: Props) {
+  const plugin = PluginLoader.plugins[id];
+  const Icon = plugin?.icon;
+
+  if (Icon) {
+    return (
+      <Wrapper>
+        <Icon size={size} fill={color} />
+      </Wrapper>
+    );
+  }
+
+  return null;
+}
+
+const Wrapper = styled.div`
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  flex-shrink: 0;
+  width: 24px;
+  height: 24px;
+`;
+
+export default PluginIcon;