[#138] Reduce the usage `$` in Indigo

Description

Problem: Indigo code often contains the $ Haskell operator, however since the language is meant to be used by people not familiar with Haskell it would be great to not make it a necessity.

Solution: Reduce usage of $ in 2 places:

1. right before do is used for a block code

• Solved by using BlockArguments

2. right after new

• Solved by treating new$ as one keyword

Related issue(s)

Resolves #138 (closed)

Depends on #169 (closed)

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