session: divide command between new empty sessions and glob to add from the pool
Add new parameters:
- [x] `-n` or `--new` to create a new empty session (this was the behavior until now)
- [x] `-c` or `--create` plus two globs for package name and version (space separated, must be quoted) to create a new session and add given packages that match the glob pattern from the pool
- [x] We remove `-a` and `--add-all`, since it can be done now with `-c * *`
issue