fix: cleanup dist folder, change README

- move images for README into docs/img
- move libs/* into utils. libs folder is copied into dist by grafana-toolkit
- remove d3-scale-chromatic sources, use it from dependencies
- update compatible versions in README
- update installation info

src/util/grafana/events/panelEvents.ts

@@ -0,0 +1,29 @@
+import { AppEvent } from './appEvents';
+
+export interface DataQueryError {
+  data?: {
+    message?: string;
+    error?: string;
+  };
+  message?: string;
+  status?: string;
+  statusText?: string;
+  refId?: string;
+  cancelled?: boolean;
+}
+
+export var refresh: AppEvent<undefined> | string = { name: 'refresh' };
+export var render: AppEvent<any> | string = { name: 'render' };
+export var dataError: AppEvent<DataQueryError> | string = { name: 'data-error' };
+export var dataReceived: AppEvent<any[]> | string = { name: 'data-received' };
+export var dataSnapshotLoad: AppEvent<any[]> | string = { name: 'data-snapshot-load' };
+export var editModeInitialized: AppEvent<undefined> | string = { name: 'init-edit-mode' };
+
+export function fallbackToStringEvents() {
+  refresh = 'refresh';
+  render = 'render';
+  dataError = 'data-error';
+  dataReceived = 'data-received';
+  dataSnapshotLoad = 'data-snapshot-load';
+  editModeInitialized = 'init-edit-mode';
+}