An option to enter a Tebako package interactively

[maxirmx]

          @maxirmx is there a command that we do not need a line `binding.irb`? 

Bundler still offers (the now deprecated) bundle console, which is now just bin/console within your gem.

• https://stackoverflow.com/questions/62289286/bundler-is-deprecating-bundle-console-in-favor-of-bin-console-can-anyone-provid

I wonder if we can allow Tebako to provide access to other executables in the bin/ directory (in addition to automatically entering a defined entrypoint).

e.g.

$ tebako exec my_package.teb bin/console
# Executes bin/console within `my_package.teb`

Originally posted by @ronaldtse in #250 (comment)

[maxirmx]

@ronaldtse, this feature consists of two sub-issues and I believe it can be supported.