Environmental variable inheritance

[tony]

A parent option, like pass_environment

tmuxp_options:
  pass_environment: true
session_name: a session

Where pass_environment can be set at any object level, and all descendants inside have the variables passed. Then, they can be opted out by setting pass_environment: false at a lower level.

tmuxp_options:
  pass_environment: true
environment:
  tippy: session variable
  toppy: session variable
windows:
  - panes:
      - shell_command:
        - echo "$TIPPY"
        - echo "$TOPPY"
      - tmuxp_options:
          pass_environment: false
        shell_command:
        - echo "$TIPPY"
        - echo "$TOPPY"
  - tmuxp_options:
      pass_environment: false
    panes:
      - shell_command:
        - echo "$TIPPY"
        - echo "$TOPPY"