[lint] Fix import order

Reorder imports to be consistenly grouped by standard library, third
party library, and local modules in that order thoughout the library.

discord/__main__.py

@@ -24,11 +24,12 @@ FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 DEALINGS IN THE SOFTWARE.
 """
 
-import discord
 import argparse
 import sys
 from pathlib import Path
 
+import discord
+
 def core(parser, args):
     pass