v0.12.0 context feature; profile tweaks

What's Changed

• 0.12: context feature; profile tweaks by @MrLixm in #11

added

• context system: allow to specify suffix tokens on launchers name to filter
  their visiblity based on the system context on runtime.
• cli: allow to specify profile to run/resolve as file paths
• launchers: add priority key to let kloch guess which launcher to use
  when a profile has multiple of them.

changed

• ! @python launcher renamed to .python because of the new context system
• ! system launcher renamed to .system for cohesion
  • updated profile version to 4
• ! system launcher: add subprocess_kwargs field, shell=True is not default anymore.
• improve error reporting when a launcher is invalid
• minor logging improvements

fixed

• issues when picking a launcher through multiple in a profile

Full Changelog: v0.11.2...v0.12.0