Stack overflow in `Document::has_leading_newline` on large document

The stack overflow occurs in the recursion at https://github.com/0xPolygonMiden/miden-formatting/blob/edcd53720ec768775053488474c7ea3f8e7c8d13/formatting/src/prettier/document.rs#L52
during pretty printing.

To reproduce: print a `midenc_codegen_masm::Program` emitted with stdlib.

Workaround: increase the stack size via `RUST_MIN_STACK=104857600` env var.

The issue points to a recursive function `Document::has_leading_newline` in formatting/src/prettier/document.rs at line 52. Start by examining that function and the `Document` type to understand the recursion. Reproduce the overflow by pretty-printing a `midenc_codegen_masm::Program` with stdlib, as described. Look for ways to convert the recursion to iteration or tail recursion. Check existing tests for the prettier module to understand the expected behavior.

Escrito por el modelo de indexación a partir del texto del issue.