Since users don't need to update config file version for minor app
releases, we have to differentiate between app and config version.
Also, expose them via `$XPLR_CONFIG_VERSION` and `$XPLR_APP_VERSION`.
Bug:
When you call some command in a directory with a large number of hosts,
xplr will fail setting the environment vars as the command will become
too large to handle.
Fix:
Port the value of multi-line variables from env vars to pipes and set
the name of the pipe as env var instead. And deprecate the variables
that doesn't make much sense.
In other words,
- `$XPLR_APP_YAML` has been removed.
- `$XPLR_RESULT` has been ported to `$XPLR_PIPE_RESULT_OUT`.
- `$XPLR_GLOBAL_HELP_MENU` has been ported to
`$XPLR_PIPE_GLOBAL_HELP_MENU_OUT`.
- `$XPLR_DIRECTORY_NODES` has been ported to
`$XPLR_PIPE_DIRECTORY_NODES_OUT`.
- `$XPLR_LOGS` has been ported to `$XPLR_PIPE_LOGS_OUT`.
- `$XPLR_PIPE_RESULT` has been ported to `$XPLR_PIPE_RESULT_OUT`.
Hence, instead of `<<< $VAR`, `< $VAR_PIPE_OUT` should be used.
- Auto `Refresh` every second.
- Add alias `BashExec` to message `Call` with args [`-c`, `bash` ...].
Also, Create alias `BashExec` to message `Call` with arguments [`bash`, `-c`]
