[V3 Core] Add [p]helpset (#1694)

* Add settings and commands for page and character limits

* Add missing returns

* Consistent responses

redbot/core/core_commands.py

@@ -831,6 +831,51 @@ class Core:
             ctx.bot.disable_sentry()
             await ctx.send(_("Done. Sentry logging is now disabled."))
 
+    @commands.group()
+    @checks.is_owner()
+    async def helpset(self, ctx: commands.Context):
+        """Manage settings for the help command."""
+        if ctx.invoked_subcommand is None:
+            await ctx.send_help()
+
+    @helpset.command(name="pagecharlimit")
+    async def helpset_pagecharlimt(self, ctx: commands.Context, limit: int):
+        """Set the character limit for each page in the help message.
+
+        This setting only applies to embedded help.
+
+        Please note that setting a relitavely small character limit may
+        mean some pages will exceed this limit. This is because categories
+        are never spread across multiple pages in the help message.
+
+        The default value is 1000 characters.
+        """
+        if limit <= 0:
+            await ctx.send(_("You must give a positive value!"))
+            return
+
+        await ctx.bot.db.help.page_char_limit.set(limit)
+        await ctx.send(_("Done. The character limit per page has been set to {}.").format(limit))
+
+    @helpset.command(name="maxpages")
+    async def helpset_maxpages(self, ctx: commands.Context, pages: int):
+        """Set the maximum number of help pages sent in a server channel.
+
+        This setting only applies to embedded help.
+
+        If a help message contains more pages than this value, the help message will
+        be sent to the command author via DM. This is to help reduce spam in server
+        text channels.
+
+        The default value is 2 pages.
+        """
+        if pages < 0:
+            await ctx.send(_("You must give a value of zero or greater!"))
+            return
+
+        await ctx.bot.db.help.max_pages_in_guild.set(pages)
+        await ctx.send(_("Done. The page limit has been set to {}.").format(pages))
+
     @commands.command()
     @checks.is_owner()
     async def listlocales(self, ctx: commands.Context):