Move modlogset/bankset commands to core (#4486)

* Move bankset and modlogset to core commands

* Move prune over too

* Finish moving prune

* Move [p]economyset registeramount to [p]bankset registeramount

* style fix

* Fix circular import issue with another breaking change

* Apparently I missed a conflict and git still let me commit...

* Really git?

* Rename RawUserIds -> RawUserIdConverter, improve documentation

* Improve documentation of `is_owner_if_bank_global()`

* MENTION_REGEX -> USER_MENTION_REGEX

* Add 'bank.' prefix

* Fix command examples in docstrings

* Missing docstring change from `bankset prune`

* Missing changes for commands in modlogset

* Update docs

* Remove duplicated info in `economyset showsettings`

* Fix toctree in index.rst

* Add command group prefixes to names of functions for bankset/modlogset

* Remaining string updates due to command name changes

* Ensure that the bank folder is actually gone

Co-authored-by: palmtree5 <palmtree5+3577255@users.noreply.github.com>
Co-authored-by: jack1142 <6032823+jack1142@users.noreply.github.com>

redbot/core/bank.py

@@ -43,6 +43,7 @@ __all__ = [
     "cost",
     "AbortPurchase",
     "bank_prune",
+    "is_owner_if_bank_global",
 ]
 
 _MAX_BALANCE = 2 ** 63 - 1
@@ -147,6 +148,44 @@ async def _process_data_deletion(
                 await _config.member_from_ids(guild_id, user_id).clear()
 
 
+def is_owner_if_bank_global():
+    """
+    Restrict the command to the bot owner if the bank is global,
+    otherwise ensure it's used in guild (WITHOUT checking any user permissions).
+
+    When used on the command, this should be combined
+    with permissions check like `guildowner_or_permissions()`.
+
+    This is a `command check <discord.ext.commands.check>`.
+
+    Example
+    -------
+
+    .. code-block:: python
+
+        @bank.is_owner_if_bank_global()
+        @checks.guildowner()
+        @commands.group()
+        async def bankset(self, ctx: commands.Context):
+            \"""Base command for bank settings.\"""
+
+    If the bank is global, the ``[p]bankset`` command can only be used by
+    the bot owners in both guilds and DMs.
+    If the bank is local, the command can only be used in guilds by guild and bot owners.
+    """
+
+    async def pred(ctx: commands.Context):
+        author = ctx.author
+        if not await is_global():
+            if not ctx.guild:
+                return False
+            return True
+        else:
+            return await ctx.bot.is_owner(author)
+
+    return commands.check(pred)
+
+
 class Account:
     """A single account.