AK: Add trim_ascii_whitespace method to String

Author: https://github.com/aryanbaburajan
Commit: a94c0eea94
Pull-request: https://github.com/SerenityOS/serenity/pull/19687
Reviewed-by: https://github.com/Hendiadyoin1
Reviewed-by: https://github.com/LucasChollet
Reviewed-by: https://github.com/gmta ✅
Reviewed-by: https://github.com/linusg

AK/String.h

@@ -150,6 +150,7 @@ public:
 
     ErrorOr<String> trim(Utf8View const& code_points_to_trim, TrimMode mode = TrimMode::Both) const;
     ErrorOr<String> trim(StringView code_points_to_trim, TrimMode mode = TrimMode::Both) const;
+    ErrorOr<String> trim_ascii_whitespace(TrimMode mode = TrimMode::Both) const;
 
     ErrorOr<Vector<String>> split_limit(u32 separator, size_t limit, SplitBehavior = SplitBehavior::Nothing) const;
     ErrorOr<Vector<String>> split(u32 separator, SplitBehavior = SplitBehavior::Nothing) const;