feat: Added documentation for OHIF-v3 (#2450)

* Added docs with new screenshots

* Added doc to architecture

* Added documentations to various extension modules

* Added more documentation to modes

* Added docs to managers

* Added docs for services

* Fixed deployment docs

* Added white labelling documentation

* Added i18n docs and measurement export

docs/latest/services/ui/ViewportGridService.md

@@ -0,0 +1,51 @@
+# Viewport Grid Service
+
+
+## Overview
+This is a new UI service, that handles the grid layout of the viewer.
+
+
+
+<div style="padding:56.25% 0 0 0;position:relative;"><iframe src="https://player.vimeo.com/video/549261939?badge=0&amp;autopause=0&amp;player_id=0&amp;app_id=58479" frameborder="0" allow="autoplay; fullscreen; picture-in-picture" allowfullscreen style="position:absolute;top:0;left:0;width:100%;height:100%;" title="Viewport Modal"></iframe></div><script src="https://player.vimeo.com/api/player.js"></script>
+
+
+## Interface
+
+For a more detailed look on the options and return values each of these methods
+is expected to support, [check out it's interface in `@ohif/core`][interface]
+
+| API Member                                                           | Description                                         |
+| -------------------------------------------------------------------- | --------------------------------------------------- |
+| `setActiveViewportIndex(index)`                                      | Sets the active viewport index in the app           |
+| `getState()`                                                         | Gets the states of the viewport (see below)         |
+| `setDisplaysetForViewport({ viewportIndex, displaySetInstanceUID })` | Sets displaySet for viewport based on displaySet Id |
+| `setLayout({numCols, numRows})`                                      | Sets rows and columns                               |
+| `reset()`                                                            | Resets the default states                           |
+
+## Implementations
+
+| Implementation         | Consumer                   |
+| ---------------------- | -------------------------- |
+| [ViewportGridProvider] | Baked into Dialog Provider |
+
+`*` - Denotes maintained by OHIF
+
+
+## State
+
+```js
+const DEFAULT_STATE = {
+  // starting from null, hanging
+  // protocol will defined number of rows and cols
+  numRows: null,
+  numCols: null,
+  viewports: [
+    /*
+     * {
+     *    displaySetInstanceUID: string,
+     * }
+     */
+  ],
+  activeViewportIndex: 0,
+}
+```