docs(*): optimize images

\docs\app\assets\img\AngularJS-small.png (1.82%)
\docs\img\One_Way_Data_Binding.png (12.15%)
\docs\img\guide\di_sequence_final.png (19.05%)
\docs\app\assets\img\bullet.png (13.68%)
\images\docs\Diagrams.svg\image1.png (1.73%)
\docs\img\angular_parts.png (30.41%)
\images\docs\tutorial\tutorial_06.svg\image15.png (1.55%)
\docs\img\Two_Way_Data_Binding.png (11.59%)
\docs\img\guide\concepts-databinding2.png (7.54%)
\images\docs\Diagrams.svg\image4.png (1.89%)
\images\docs\Diagrams.svg\image2.png (1.93%)
\images\docs\Diagrams.graffle\image9.png (2.12%)
\docs\img\guide\concepts-module-injector.png (2.41%)
\docs\img\guide\hero-detail.png (41.79%)
\images\docs\tutorial\tutorial_09.graffle\image9.png (7.86%)
\images\docs\Diagrams.svg\image9.png (2.12%)
\images\docs\guide\concepts.graffle\image4.png (10.43%)
\docs\img\guide\scenario_runner.png (37.15%)
\docs\img\guide\concepts-directive.png (1.05%)
\docs\img\guide\concepts-databinding1.png (8.75%)
\images\docs\guide\concepts.graffle\image1.png (9%)
\images\docs\tutorial\tutorial_09.svg\image9.png (15.35%)
\docs\img\form_data_flow.png (6.68%)
\docs\img\guide\heroes-list.png (40.81%)
\images\docs\guide\concepts.graffle\image5.png (12.02%)
\docs\img\guide\simple_scope_final.png (0.51%)
\docs\img\guide\concepts-startup.png (3.22%)
\docs\img\tutorial\tutorial_12.png (10.49%)
\images\docs\guide\concepts.svg\image4.png (10.43%)
\images\docs\Diagrams.graffle\image4.png (1.89%)
\docs\img\tutorial\tutorial_05.png (11.11%)
\docs\img\tutorial\catalog_screen.png (0.46%)
\images\docs\tutorial\tutorial_10.graffle\image10.png (5.73%)
\images\docs\tutorial\simple_scope.graffle\image7.png (43.81%)
\images\docs\guide\simple_scope.graffle\image7.png (43.81%)
\images\docs\tutorial\tutorial_02.graffle\image11.png (0.19%)
\docs\img\guide\crisis-list.png (39.68%)
\docs\img\guide\concepts-runtime.png (2.48%)
\images\docs\guide\concepts.svg\image5.png (12.02%)
\docs\img\guide\concepts-view.png (2.98%)
\images\docs\tutorial\tutorial_02.svg\image11.png (28.1%)
\docs\img\tutorial\tutorial_00.png (10.99%)
\docs\img\tutorial\tutorial_06.png (11.3%)
\docs\img\guide\crisis-detail.png (38.86%)
\docs\img\guide\concepts-scope-watch-strategies.png (7.59%)
\images\docs\guide\simple_scope.svg\image7.png (43.81%)
\docs\img\tutorial\tutorial_09.png (10.7%)
\images\docs\tutorial\tutorial_12.svg\image10.png (25.88%)
\images\docs\tutorial\tutorial_10.svg\image10.png (25.88%)
\images\logo\AngularJS.exports\AngularJS-large.png (3.86%)
\images\docs\Diagrams.graffle\image1.png (1.73%)
\images\docs\tutorial\tutorial_03.svg\image11.png (28.1%)
\docs\img\tutorial\tutorial_10.png (10.44%)
\images\docs\tutorial\tutorial_proto.graffle\image7.png (43.81%)
\images\docs\tutorial\simple_scope.svg\image7.png (43.81%)
\images\logo\AngularJS.exports\AngularJS-small.png (3.64%)
\images\docs\tutorial\tutorial_proto.svg\image7.png (43.81%)
\docs\img\tutorial\tutorial_02.png (10.91%)
\images\docs\tutorial\tutorial_05.graffle\image13.png (10.92%)
\images\logo\AngularJS-Shield.exports\AngularJS-Shield-large.png (5.3%)
\docs\img\tutorial\tutorial_03.png (10.77%)
\images\docs\tutorial\tutorial_05.svg\image13.png (3.46%)
\images\logo\AngularJS.graffle\image1.png (0.55%)
\images\docs\Diagrams.graffle\image2.png (1.93%)
\images\docs\tutorial\tutorial_12.graffle\image10.png (5.73%)
\images\logo\AngularJS-Shield.exports\AngularJS-Shield-huge.png (2.99%)
\images\docs\tutorial\tutorial_06.graffle\image15.png (16.51%)
\images\logo\AngularJS.graffle\image2.png (5.21%)
\docs\img\guide\hashbang_vs_regular_url.jpg (32.92%)
\images\logo\AngularJS-Shield.exports\AngularJS-Shield-medium.png (6.18%)
\images\logo\AngularJS-Shield.exports\AngularJS-Shield-small.png (6.58%)
\images\logo\AngularJS.exports\AngularJS-medium.png (3.37%)
\images\logo\AngularJS.exports\AngularJS-huge.png (3.56%)

Closes angular#16222