[TM-166] Add benchmarks

Description

This MR adds benchmarks for parsing, type checking and interpreting.

Some small amounts of code that needed to be shared between tests and benchmarks has been moved into its own directory at test-bench-src and added to source-dirs of both tests and benchmarks.

Related issue(s)

None

Resolves #11 (closed)

✅ Checklist for your Merge Request

Related changes (conditional)

• Tests (see short guidelines)

  • If I added new functionality, I added tests covering it.
  • If I fixed a bug, I added a regression test to prevent the bug from silently reappearing again.

• Documentation

  • I checked whether I should update the docs and did so if necessary:
    • README
    • Haddock
    • docs/

Stylistic guide (mandatory)

• My commits comply with the following policy.
• My code complies with the style guide.