feat(welcomer): added the welcomer cog

welcomer/__init__.py

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+from .welcomer import Welcomer
+
+
+async def setup(bot):
+    await bot.add_cog(Welcomer(bot))

welcomer/info.json

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+{
+  "author" : ["SeaswimmerTheFsh (seasw.)"],
+  "install_msg" : "Thank you for installing Nerdify!\nYou can find the source code of this cog [here](https://coastalcommits.com/SeaswimmerTheFsh/SeaCogs). Based off of PhasecoreX's [UwU](<https://github.com/PhasecoreX/PCXCogs/tree/master/uwu>) cog.",
+  "name" : "Nerdify",
+  "short" : "Nerdify your text!",
+  "description" : "Nerdify your text!",
+  "end_user_data_statement" : "This cog does not store end user data.",
+  "hidden": false,
+  "disabled": false,
+  "min_bot_version": "3.5.0",
+  "min_python_version": [3, 8, 0],
+  "tags": [
+      "fun",
+      "text",
+      "meme"
+  ]
+}

welcomer/welcomer.py

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+#   _____                         _
+#  / ____|                       (_)
+# | (___   ___  __ _ _____      ___ _ __ ___  _ __ ___   ___ _ __
+#  \___ \ / _ \/ _` / __\ \ /\ / / | '_ ` _ \| '_ ` _ \ / _ \ '__|
+#  ____) |  __/ (_| \__ \\ V  V /| | | | | | | | | | | |  __/ |
+# |_____/ \___|\__,_|___/ \_/\_/ |_|_| |_| |_|_| |_| |_|\___|_|
+
+
+from redbot.core import commands, Config
+from redbot.core.utils import chat_formatting as cf
+
+
+class Welcomer(commands.Cog):
+    """Manage welcome messages for new members and leave messages for former members."""
+
+    __author__ = ["SeaswimmerTheFsh"]
+    __version__ = "0.1.0"
+
+    def __init__(self, bot):
+        self.bot = bot
+        self.config = Config.get_conf(self, identifier=1234567890, force_registration=True)
+        self.config.register_guild(
+            welcome_message=None,
+            leave_message=None,
+            channel=None,
+            enabled=False,
+        )
+
+    def format_help_for_context(self, ctx: commands.Context) -> str:
+        pre_processed = super().format_help_for_context(ctx) or ""
+        n = "\n" if "\n\n" not in pre_processed else ""
+        text = [
+            f"{pre_processed}{n}",
+            f"Cog Version: **{self.__version__}**",
+            f"Author: {cf.humanize_list(self.__author__)}",
+        ]
+        return "\n".join(text)
+
+    def placeholders(self, )