Caos

Start the project from scratch. This new version includes;
- Use of a YAML configuration file instead of the previous JSON format
- Support of custom names for the virtual environments
- Support for semantic updates (similar to npm) in the dependencies section of the configuration file
- The ability to add custom tasks to be executed

it also removes:
- The unittest command, as it can be simulated using the new run feature.
- The test command

it modifies:
- The behavior of the run command to call defined tasks

[Bugfix] Remove unnecessary key validations from the caos.json file when running "caos check"

[Bugfix] Remove unnecessary key validations done to the caos.json when the "caos update" command is executed.

Revert the pip update command download only binaries as it broke the installation of multiple packages that dont have binaries available in pypi.

-Make the pip update command download only binaries.
-Include the "unittest" command for executing unit tests in a given path.
- Make the validations of the caos.json keys specific to each command instead of validating all keys no matter the command.

Add the "python" and "pip" commands to the list of available console commands, to provide a fast and easy access to virtual environment binaries. Modify the "test" command to run in verbose mode to provide more level of detail on the unit tests.