feat(rules): breaking-change-exclamation-mark pull request changes

Addresses review feedback from @JounQin about pull request #4548.

- Use `breakingHeaderPattern` to search for the exclamation mark in the header.
- Correct the regular expression to require that BREAKING CHANGE in the footer be anchored at the
  beginning of a line.
- Updated the `RulesConfig` type.

Author: adamchristiansen

@commitlint/rules/src/breaking-change-exclamation-mark.ts

@@ -16,8 +16,9 @@ export const breakingChangeExclamationMark: SyncRule = (
 		return [true];
 	}
 
-	const hasExclamationMark = !!header && /!:/.test(header);
-	const hasBreakingChange = !!footer && /BREAKING[ -]CHANGE:/.test(footer);
+	const hasExclamationMark =
+		!!header && /^(\w*)(?:\((.*)\))?!: (.*)$/.test(header);
+	const hasBreakingChange = !!footer && /^BREAKING[ -]CHANGE:/m.test(footer);
 
 	const negated = when === "never";
 	const check = hasExclamationMark === hasBreakingChange;

@commitlint/types/src/rules.ts

@@ -97,6 +97,7 @@ export type RulesConfig<V = RuleConfigQuality.User> = {
 	"body-max-length": LengthRuleConfig<V>;
 	"body-max-line-length": LengthRuleConfig<V>;
 	"body-min-length": LengthRuleConfig<V>;
+	"breaking-change-exclamation-mark": CaseRuleConfig<V>;
 	"footer-empty": RuleConfig<V>;
 	"footer-leading-blank": RuleConfig<V>;
 	"footer-max-length": LengthRuleConfig<V>;