Design the Enso Launcher Script

[iamrecursion]

Summary

In order to properly manage Enso and the underlying JVM, we need a launcher program that fills a role akin to some parts of stack.

Value

We have an idea of how we can manage multiple Enso and GraalVM versions.

Specification

• As it can't depend on the presence of a JVM, this script must be written in a compiled language.
• Select between Haskell and Rust for writing the launcher script.
• Determine the functionality needed for the launcher script.
• Document the design of the launcher script in doc/distribution/launcher.md.

Acceptance Criteria & Test Cases

• We have a concrete design for the Enso launcher script.

[iamrecursion]

Obsoleted by #955.