fix (tasklist): Various bugfixes.

Fix issue where empty tasklist would raise ZeroDivisionError.
Fix issue where empty tasklist UI would error.
Fix issue where >4000 char tasklists would error on bulk edit.
Fix `/tasks edit` not responding to interaction.
Fix task acmpl going over 100 chars.
Fix empty tasklist text and UI layout.
Add `/tasks upload` for editing long tasklist.
Small UI tweaks.
Make `LionContext.error_reply` always ephemeral if possible.

src/meta/LionContext.py

@@ -122,6 +122,8 @@ class LionContext(Context['LionBot']):
 
         # Expect this may be run in highly unusual circumstances.
         # This should never error, or at least handle all errors.
+        if self.interaction:
+            kwargs.setdefault('ephemeral', True)
         try:
             await self.reply(content=content, **kwargs)
         except discord.HTTPException: