Runmd

Added
* add environment manager

Added
* add the capacity to interact with user

Changed
* move command name constants in an Enum class

Added
* add vault command to encrypt/decrypt markdown files

Fixed
* add rootpath to history to locate the original md file

Added
* add shebang detection in code blocks
* add package upload to PYPI
* add commands module to create the CLI parser

Removed
* remove cliargs function from cli module

Added
* add run command to CLI shell (experimental)
* add show command to CLI shell (experimental)
* add list command to CLI shell (experimental)
* add input markdown file handling
* add color to code block displayed with the show command
* add pygments as a dependency
* add vault features to encrypt/decrypt markdown files (experimental)
* add sandbox dockerfiles for alpine and debian