New additions
* Added new `snow auth keypair` commands:
* `setup` - generate key pair, set public key for the user in Snowflake and update/create connection.
* `rotate` - rotate keys for connection.
* `list` - list the public keys for the user.
* `remove` - remove the public key for the user.
* `status` - verifies the key pair configuration and tests the connection.
* The `snow connection add` command has been enhanced to include key pair authentication when a password is provided.
* Added support for `!source` command in SQL. This command allows to execute SQL from a local file.
Fixes and improvements
* Fix for incompatible options in `snow spcs compute-pool` commands didn't raise error.
* Change binary builds to embed whole Python environment.
* Fixed recursive copying to stage for unbalanced directory trees.
* Fixed checking for new CLI version.