Update the walkthrough

Add some GIFs and additional steps for running, debugging and DocC
previewing.

Issue: #1560

Author: rbenegal

assets/walkthrough/createNewProject.md

@@ -1,3 +1,6 @@
+# Create a New Swift Project
+![Create new project](./images/createNewProject.gif)
+
 There are several project templates to choose from:
 - `Library`: A package with a library. Use this to publish code for other packages to consume.
 - `Executable`: A package with an executable. Use this for command line utilities.
@@ -9,4 +12,10 @@ There are several project templates to choose from:
 
 Once you select a template, you'll be prompted to enter a name for your new project. This will be the name of the folder created in your workspace.
 
-Finally, you'll be prompted to select a location for your new project. You can choose any location in your workspace, or create a new folder.
+Finally, you'll be prompted to select a location for your new project. You can choose any location in your workspace, or create a new folder.
+
+![Open existing project](./images/openProject.gif)
+
+When you open an existing project with a ``Package.swift`` file the extension will start automatically.
+
+Tip: You can view more information about the toolchain and other configurations being used for the project by hovering over the `{}` icon in the status bar.

assets/walkthrough/customizeSettings.md

@@ -0,0 +1,23 @@
+# Swift Extension Settings
+
+![Swift Extension Settings](./images/settings.gif)
+
+The Swift Extension contains several settings you can customize. 
+
+## Workspace Settings
+
+**Add details about custom workspace settings and environment variable here.**
+
+## Inlay Hints
+
+Some language settings such as those for inlay hints for inferred variable types are turned on by default in VS Code.
+
+![Disable Inlay Hints](./images/disableInlayHints.gif)
+
+You can turn off inlay hints for Swift by adding `[swift]` specific settings to your `settings.json` file:
+
+```
+   "[swift]": {
+        "editor.inlayHints.enabled": "off"
+    },
+```