Unify CLI tools commands names

[sujaya-sys]

We need to come up with proper commands names for all CLI tools that would be also proper to the context. Currently we are using a single command named run.

Some suggestions could be:

• export or convert command to create a target compose YAML, Helm values file, or Humanitec deployment draft
• deploy to trigger Humanitec deployment
• lint to validate input SCORE file and all other settings. Or, may be, introduce --dry-run flag instead.

Some CLI tools to check for reference:

• https://docs.docker.com/engine/reference/commandline/compose/#child-commands
• https://helm.sh/docs/helm/