rewrite: Initial rewrite skeleton.

Remove modules that will no longer be required.
Move pending modules to pending-rewrite folders.

bot/modules/pending-rewrite/meta/join_message.py

@@ -0,0 +1,50 @@
+import discord
+
+from cmdClient import cmdClient
+
+from meta import client, conf
+from .lib import guide_link, animation_link
+
+
+message = """
+Thank you for inviting me to your community.
+Get started by typing `{prefix}help` to see my commands, and `{prefix}config info` \
+    to read about my configuration options!
+
+To learn how to configure me and use all of my features, \
+    make sure to [click here]({guide_link}) to read our full setup guide.
+
+Remember, if you need any help configuring me, \
+    want to suggest a feature, report a bug and stay updated, \
+    make sure to join our main support and study server by [clicking here]({support_link}).
+
+Best of luck with your studies!
+
+""".format(
+    guide_link=guide_link,
+    support_link=conf.bot.get('support_link'),
+    prefix=client.prefix
+)
+
+
+@client.add_after_event('guild_join', priority=0)
+async def post_join_message(client: cmdClient, guild: discord.Guild):
+    try:
+        await guild.me.edit(nick="Leo")
+    except discord.HTTPException:
+        pass
+    if (channel := guild.system_channel) and channel.permissions_for(guild.me).embed_links:
+        embed = discord.Embed(
+            description=message
+        )
+        embed.set_author(
+            name="Hello everyone! My name is Leo, the StudyLion!",
+            icon_url="https://cdn.discordapp.com/emojis/933610591459872868.webp"
+        )
+        embed.set_image(url=animation_link)
+        try:
+            await channel.send(embed=embed)
+        except discord.HTTPException:
+            # Something went wrong sending the hi message
+            # Not much we can do about this
+            pass