feat: add __main__.py, fix regex warning, document all commands in README

- Add ampy/__main__.py so the package can be invoked with python -m ampy
  (PR #121)
- Fix SyntaxWarning: use raw string r"^COM(\d+)$" in windows_full_port_name
  (PR #129)
- Document mkdir, rmdir, and reset commands in README command list,
  align column widths for readability (PR #115)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: curiouswala

README.md

@@ -58,11 +58,14 @@ You should see usage information displayed like below:
       --help           Show this message and exit.
 
     Commands:
-      get  Retrieve a file from the board.
-      ls   List contents of a directory on the board.
-      put  Put a file on the board.
-      rm   Remove a file from the board.
-      run  Run a script and print its output.
+      get    Retrieve a file from the board.
+      ls     List contents of a directory on the board.
+      mkdir  Create a directory on the board.
+      put    Put a file or folder and its contents on the board.
+      rm     Remove a file from the board.
+      rmdir  Forcefully remove a folder and all its children from the board.
+      run    Run a script and print its output.
+      reset  Perform soft reset/reboot of the board.
 
 If you'd like to install from the Github source then use the standard Python
 setup.py install (or develop mode):

ampy/__main__.py

@@ -0,0 +1,4 @@
+from ampy.cli import cli
+
+if __name__ == "__main__":
+    cli()

ampy/cli.py

@@ -63,7 +63,7 @@ def windows_full_port_name(portname):
     # 9 are just referred to by COM1, COM2, etc. (wacky!)  See this post for
     # more info and where this code came from:
     # http://eli.thegreenplace.net/2009/07/31/listing-all-serial-ports-on-windows-with-python/
-    m = re.match("^COM(\d+)$", portname)
+    m = re.match(r"^COM(\d+)$", portname)
     if m and int(m.group(1)) < 10:
         return portname
     else: