feat: Compose import-tree by juxtaposition (inspired by denful/ned)

[vic]

This adds the following juxtaposition syntax for combining:

import-tree (it: it.addScoped x) (it: it.addAPI y) (it: it.addScoped z) ./modules

previously we only had the builder pattern which requires more parens

(((import-tree.addScoped x).addAPI y).addScoped z) ./modules

both work now.

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This is inspired on how streams compose at denful/ned