docs(config): add some simple docs for limel-config

`limel-config` is marked as private, but is linked to from the docs
about how to provide your own icon library.

etc/lime-elements.api.md

@@ -253,7 +253,6 @@ export namespace Components {
         "required": boolean;
         "value": string;
     }
-    // (undocumented)
     export interface LimelConfig {
         "config": Config;
     }
@@ -1056,7 +1055,6 @@ namespace JSX_2 {
         "required"?: boolean;
         "value"?: string;
     }
-    // (undocumented)
     interface LimelConfig {
         "config"?: Config;
     }

src/components/config/config.tsx

@@ -2,6 +2,18 @@ import { Component, Prop } from '@stencil/core';
 import { Config, globalConfig } from '../../global/config';
 
 /**
+ * Component used to set global configuration for Lime Elements.
+ *
+ * :::warning
+ * **Building something for Lime CRM?** Then you should _NOT_ use this component.
+ * Lime CRM already uses this component to set the global configuration for
+ * Lime Elements. No matter what problem you are facing at the moment, using
+ * this component will not help, and might cause other problems.
+ * :::
+ *
+ * Building your own software, which is using Lime Elements?
+ * Then you _might_ need to use this component.
+ *
  * @private
  */
 @Component({