vscode: use insiders build if stable not found (#8568)

* 🔨 Add calling VS Code Insiders

* ✏️ Update README.md

plugins/vscode/README.md

-# VS code
+# VS Code
 
-This plugin makes interaction between the command line and the code editor easier.
+This plugin makes interaction between the command line and the VS Code editor easier.
 
 To start using it, add the `vscode` plugin to your `plugins` array in `~/.zshrc`:
 
@@ -8,9 +8,11 @@ To start using it, add the `vscode` plugin to your `plugins` array in `~/.zshrc`
 plugins=(... vscode)
 ```
 
-If you are using [Visual Studio Code Insiders](https://code.visualstudio.com/insiders/),
-add the following line in the oh-my-zsh settings section (between the `ZSH_THEME` and
-the `plugins=()` line). This will make the plugin use the Insiders version instead.
+## VS Code Insiders
+
+🍏 **If you are only using [VS Code Insiders](https://code.visualstudio.com/insiders/), the plugin will automatically bind to your Insiders installation.**
+
+But, if you have both Stable and Insiders versions and want to configure the plugin to just use the Insiders version, add the following line in the oh-my-zsh settings section (between the `ZSH_THEME` and the `plugins=()` line). This will make the plugin use the Insiders version instead.
 
 ```zsh
 ZSH_THEME=...

plugins/vscode/vscode.plugin.zsh

 # VScode zsh plugin
-# author: https://github.com/MarsiBarsi
+# Authors:
+#   https://github.com/MarsiBarsi (original author)
+#   https://github.com/babakks
 
-# Use main Visual Studio Code version by default
-: ${VSCODE:=code}
+# Use the stable VS Code release, unless the Insiders version is the only
+# available installation
+if ! which code > /dev/null && which code-insiders > /dev/null; then
+  : ${VSCODE:=code-insiders}
+else
+  : ${VSCODE:=code}
+fi
 
+# Define aliases
 alias vsc="$VSCODE ."
 alias vsca="$VSCODE --add"
 alias vscd="$VSCODE --diff"