feat: add --load option to execute commands from file on launch

aider/args.py

@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-#ai add --load <fname> and call cmd_load with it in main!
 import argparse
 import os
 import sys
@@ -664,7 +663,7 @@ def get_parser(default_config_files, git_root):
     group.add_argument(
         "--load",
         metavar="LOAD_FILE",
-        help="Load and execute commands from a file",
+        help="Load and execute /commands from a file on launch",
     )
     group.add_argument(
         "--encoding",

aider/main.py

@@ -1,4 +1,4 @@
-#ai
+# ai
 import configparser
 import json
 import os
@@ -772,7 +772,6 @@ def main(argv=None, input=None, output=None, force_git_root=None, return_coder=F
 
     if args.load:
         commands.cmd_load(args.load)
-        return
 
     if args.exit:
         return