81884 Gesture recognizer cleanup (framework, cla: yes, d: api docs, a: quality, f: gestures, documentation)

81932 Add some examples of widgets that support visual density (framework, f: material design, cla: yes, d: api docs, waiting for tree to go green, documentation)

82843 refactor: Add MaterialStateMixin (severe: new feature, framework, f: material design, cla: yes, d: api docs, d: examples, a: quality, waiting for tree to go green, documentation)

82885 Re-apply “Gesture recognizer cleanup” (framework, cla: yes, d: api docs, a: quality, f: gestures, documentation)

83428 add AnimatedScale and AnimatedRotation widgets (severe: new feature, framework, a: animation, cla: yes, d: api docs, d: examples, waiting for tree to go green, documentation)