feature (sponsors): Add sponsor command.

Add new sponsor prompts.
Add new sponsor command.
Add `sponsor_text` table.
Add sponsor global config settings.
Update `Setting.command` to use new `widget`.
Add custom `cmd_str` support to `Message` `SettingType`.

bot/modules/sponsors/commands.py

@@ -0,0 +1,27 @@
+from cmdClient.checks import is_owner
+
+from .module import module
+from .config import settings
+
+
+@module.cmd(
+    name="sponsors",
+    group="Meta",
+    desc="Check out our wonderful partners!",
+    flags=('edit', 'prompt')
+)
+async def cmd_sponsors(ctx, flags):
+    """
+    Usage``:
+        {prefix}sponsors
+    """
+    if await is_owner.run(ctx) and any(flags.values()):
+        if flags['edit']:
+            # Run edit setting command
+            await settings.sponsor_message.command(ctx, 0)
+        elif flags['prompt']:
+            # Run prompt setting command
+            await settings.sponsor_prompt.command(ctx, 0)
+    else:
+        # Display message
+        await ctx.reply(**settings.sponsor_message.args(ctx))