feature: build overrides (#2212)

* add build overrides

* override docs

* add server submodule

* add overrides to build step

* remove testing api url

Co-Authored-By: Quahu <quahuu@gmail.com>

Co-authored-by: Quahu <quahuu@gmail.com>

docs/faq/build_overrides/what-are-they.md

@@ -0,0 +1,41 @@
+---
+uid: FAQ.BuildOverrides.WhatAreThey
+title: Build Overrides, What are they?
+---
+
+# Build Overrides
+
+Build overrides are a way for library developers to override the default behavior of the library on the fly. Adding them to your code is really simple.
+
+## Installing the package
+
+The build override package can be installed on nuget [here](TODO) or by using the package manager
+
+```
+PM> Install-Package Discord.Net.BuildOverrides
+```
+
+## Adding an override
+
+```cs
+public async Task MainAsync()
+{
+  // hook into the log function
+  BuildOverrides.Log += (buildOverride, message) => 
+  {
+    Console.WriteLine($"{buildOverride.Name}: {message}");
+    return Task.CompletedTask;
+  };
+
+  // add your overrides
+  await BuildOverrides.AddOverrideAsync("example-override-name");
+}
+
+```
+
+Overrides are normally built for specific problems, for example if someone is having an issue and we think we might have a fix then we can create a build override for them to test out the fix.
+
+## Security and Transparency
+
+Overrides can only be created and updated by library developers, you should only apply an override if a library developer askes you to.
+Code for the overrides server and the overrides themselves can be found [here](https://github.com/discord-net/Discord.Net.BuildOverrides).

docs/faq/toc.yml

@@ -22,3 +22,5 @@
       topicUid: FAQ.TextCommands.General
 - name: Legacy or Upgrade
   topicUid: FAQ.Legacy
+- name: Build Overrides
+  topicUid: FAQ.BuildOverrides.WhatAreThey