* add patch command
This commit adds the `patch`, `patch_list` and `patch_revert` commands
and adds the `pwntools==4.8.0` as Pwndbg dependency.
The current implementation could be further improved by:
- adding tests :)
- maybe moving `patch_list` and `patch_revert` to `patch --list` and
`patch --revert` flags?
- better handling of incorrect args/pwnlib exceptions
* lint
* remove py2 coding notations from files
* remove six package use and replace with proper py3 code
* remove py2 futures use
* replace unicode string literals with string literals
* remove python2 urlparse import in favor of python3 urllib.parse
* keep ida_script in py2 version
* remove hashbang python lines as the files are never ran directly