Document display line movement best practices (#3623)

* Document display line moving best practices

To vertically move to wrapped lines when word wrap is on.

Ref: #2403 (comment)
Ref: #2924 (comment)

* Remove extra line

* Disable Prettier formatting on code block

README.md

@@ -617,7 +617,7 @@ Vim has a lot of nifty tricks and we try to preserve some of them:
 
 - How can I use the commandline when in Zen mode or when the status bar is disabled?
 
-  This extension exposes a remappable command to show a vscode style quick-pick, limited functionality, version of the commandline. This can be remapped as follows in visual studio keybindings.json settings file.
+  This extension exposes a remappable command to show a vscode style quick-pick, limited functionality, version of the commandline. This can be remapped as follows in VS Code's keybindings.json settings file.
 
   ```json
   {
@@ -637,6 +637,34 @@ Vim has a lot of nifty tricks and we try to preserve some of them:
   }
   ```
 
+- How can I move the cursor by each display line with word wrapping?
+
+  If you have word wrap on and would like the cursor to enter each wrapped line when using <kbd>j</kbd>, <kbd>k</kbd>, <kbd>↓</kbd> or <kbd>↑</kbd>, set the following in VS Code's keybindings.json settings file ([other options exist](https://github.com/VSCodeVim/Vim/issues/2924#issuecomment-476121848) but they are slow):
+
+  <!-- prettier-ignore -->
+  ```json
+  {
+    "key": "up",
+    "command": "cursorUp",
+    "when": "editorTextFocus && vim.active && !inDebugRepl && !suggestWidgetMultipleSuggestions && !suggestWidgetVisible"
+  },
+  {
+    "key": "down",
+    "command": "cursorDown",
+    "when": "editorTextFocus && vim.active && !inDebugRepl && !suggestWidgetMultipleSuggestions && !suggestWidgetVisible"
+  },
+  {
+    "key": "k",
+    "command": "cursorUp",
+    "when": "editorTextFocus && vim.active && !inDebugRepl && vim.mode == 'Normal' && !suggestWidgetMultipleSuggestions && !suggestWidgetVisible"
+  },
+  {
+    "key": "j",
+    "command": "cursorDown",
+    "when": "editorTextFocus && vim.active && !inDebugRepl && vim.mode == 'Normal' && !suggestWidgetMultipleSuggestions && !suggestWidgetVisible"
+  }
+  ```
+
 ## ❤️ Contributing
 
 This project is maintained by a group of awesome [people](https://github.com/VSCodeVim/Vim/graphs/contributors) and contributions are extremely welcome :heart:. For a quick tutorial on how you can help, see our [contributing guide](/.github/CONTRIBUTING.md).