Function parse_comma_set 

pub fn parse_comma_set(input: &str) -> BTreeSet<String>

Parse a comma/whitespace separated string into a lowercase-trimmed set.

Example

use agentic_tools_utils::cli::parse_comma_set;

let set = parse_comma_set("foo, BAR, baz");
assert!(set.contains("foo"));
assert!(set.contains("bar"));
assert!(set.contains("baz"));
assert_eq!(set.len(), 3);