refactor(types): Split types into separate files

* for better organization split typings into separate files
* use index as barrel file

src/types/types.ts

@@ -0,0 +1,83 @@
+import { Edge } from './edge'
+import { Node } from './node'
+
+export type ElementId = string
+
+export type FlowElement<T = any> = Node<T> | Edge<T>
+
+export type Elements<T = any> = Array<FlowElement<T>>
+
+export type Transform = [number, number, number]
+
+export enum Position {
+  Left = 'left',
+  Top = 'top',
+  Right = 'right',
+  Bottom = 'bottom',
+}
+
+export interface XYPosition {
+  x: number
+  y: number
+}
+
+export interface Dimensions {
+  width: number
+  height: number
+}
+
+export interface Rect extends Dimensions, XYPosition {}
+
+export type SnapGrid = [number, number]
+
+export enum ArrowHeadType {
+  Arrow = 'arrow',
+  ArrowClosed = 'arrowclosed',
+}
+
+export enum BackgroundVariant {
+  Lines = 'lines',
+  Dots = 'dots',
+}
+
+export interface SelectionRect extends Rect {
+  startX: number
+  startY: number
+  draw: boolean
+}
+
+export type FitViewParams = {
+  padding?: number
+  includeHiddenNodes?: boolean
+  minZoom?: number
+  maxZoom?: number
+}
+
+export type FlowExportObject<T = any> = {
+  elements: Elements<T>
+  position: [number, number]
+  zoom: number
+}
+
+export type FlowTransform = {
+  x: number
+  y: number
+  zoom: number
+}
+
+export type FitViewFunc = (fitViewOptions?: FitViewParams) => void
+export type ProjectFunc = (position: XYPosition) => XYPosition
+export type ToObjectFunc<T = any> = () => FlowExportObject<T>
+
+export type OnLoadParams<T = any> = {
+  zoomIn: () => void
+  zoomOut: () => void
+  zoomTo: (zoomLevel: number) => void
+  fitView: FitViewFunc
+  project: ProjectFunc
+  getElements: () => Elements<T>
+  setTransform: (transform: FlowTransform) => void
+  toObject: ToObjectFunc<T>
+}
+
+export type OnLoadFunc<T = any> = (params: OnLoadParams<T>) => void