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/managers/hotkeys.md

@@ -0,0 +1,75 @@
+# Hotkeys Managers
+
+## Overview
+`HotkeysManager` handles all the logics for adding, setting and enabling/disabling
+the hotkeys.
+
+
+
+## Instantiation
+`HotkeysManager` is instantiated in the `appInit` similar to the other managers.
+
+```js
+const commandsManager = new CommandsManager(commandsManagerConfig);
+const servicesManager = new ServicesManager(commandsManager);
+const hotkeysManager = new HotkeysManager(commandsManager, servicesManager);
+const extensionManager = new ExtensionManager({
+  commandsManager,
+  servicesManager,
+  hotkeysManager,
+  appConfig,
+});
+```
+
+
+
+
+## Hotkeys Manager API
+
+- `setHotkeys`: The most important method in the `HotkeysManager` which binds the keys with commands.
+- `setDefaultHotKeys`: set the defaultHotkeys **property**. Note that, this method **does not** bind the provided hotkeys; however, when `restoreDefaultBindings`
+is called, the provided defaultHotkeys will get binded.
+- `destroy`: reset the HotkeysManager, and remove the set hotkeys and empty out the `defaultHotkeys`
+
+
+
+## Structure of a Hotkey Definition
+A hotkey definition should have the following properties:
+
+- `commandName`: name of the registered command
+- `commandOptions`: extra arguments to the commands
+- `keys`: an array defining the key to get binded to the command
+- `label`: label to be shown in the hotkeys preference panel
+- `isEditable`: whether the key can be edited by the user in the hotkey panel
+
+
+### Default hotkeysBindings
+The default key bindings can be find in `hotkeyBindings.js`
+
+```js
+// platform/core/src/defaults/hotkeyBindings.js
+
+export default [
+  /**..**/
+  {
+    commandName: 'setToolActive',
+    commandOptions: { toolName: 'Zoom' },
+    label: 'Zoom',
+    keys: ['z'],
+    isEditable: true,
+  },
+
+  {
+    commandName: 'flipViewportHorizontal',
+    label: 'Flip Vertically',
+    keys: ['v'],
+    isEditable: true,
+  },
+  /**..**/
+]
+```
+
+
+## Behind the Scene
+When you `setHotkeys`,  the `commandName` gets registered with the `commandsManager` and
+get run after the key is pressed.