[WIP] feat: place downleveled files next to original

[trivikr]

Issue #, if available:
Attempts to fix: #15
Follow-up to #16

Description of changes:
Discontinued, as TypeScript does not pick up downleveled types.

• The exports need to be done from index.ts for each folder.
• The downlevelIdentifier needs to be added index.d.ts while importing.

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