fix(isa-utils): escape control characters in quoted strings

[pengqima]

Summary

powdr_isa_utils::quote previously escaped backslashes and double quotes, but left control characters such as newlines, carriage returns, and tabs unchanged. That could produce quoted strings containing raw control characters instead of escaped sequences.

This change extends quote to emit escaped forms for common control characters and unicode-style escapes for other control characters. It also adds a regression test for newline, tab, and carriage return escaping.

Testing

• cargo fmt --check -p powdr-isa-utils
• git diff --check
• rustc --edition=2021 --test isa-utils/src/lib.rs and ran quote_escapes_control_characters
• Verified with a temporary copy of the old implementation that the regression test fails before this change