Update resource links in docs (microsoft#447)

Description of changes

Updates the main readme.md and getting-started.md resource links.

- Adds a link to the VS Code webview UX guidelines
- Simplifies the naming of other VS Code webview doc links
- Removes the Storybook link in anticipation of removing Storybook

README.md

@@ -34,11 +34,11 @@ For more information, check out the following documentation:
 
 -   [Component Docs](./docs/components.md)
 -   [Toolkit Extension Samples](https://github.com/microsoft/vscode-webview-ui-toolkit-samples)
+-   [Webview API Guide](https://code.visualstudio.com/api/extension-guides/webview)
+-   [Webview API Guidelines](https://code.visualstudio.com/api/references/extension-guidelines#webviews)
+-   [Webview UX Guidelines](https://code.visualstudio.com/api/ux-guidelines/webviews)
+-   [Extension API Docs](https://code.visualstudio.com/api)
 -   [Figma Toolkit](https://www.figma.com/community/file/1071566662997054792/Webview-UI-Toolkit-for-Visual-Studio-Code)
--   [Storybook (Interactive Component Sandbox)](https://microsoft.github.io/vscode-webview-ui-toolkit/)
--   [Visual Studio Code Webview Guide](https://code.visualstudio.com/api/extension-guides/webview)
--   [Visual Studio Code Webview Guidelines](https://code.visualstudio.com/api/references/extension-guidelines#webviews)
--   [Visual Studio Code Extension API Docs](https://code.visualstudio.com/api)
 
 ## A note on webview usage
 

docs/getting-started.md

@@ -506,8 +506,8 @@ You can find a [completed hello world extension](https://github.com/microsoft/vs
 One more thing: Check out our component documentation and Visual Studio Code guides on how to work with webviews.
 
 - [Component Docs](./components.md)
-- [Storybook (Interactive Component Sandbox)](https://microsoft.github.io/vscode-webview-ui-toolkit/)
 - [Toolkit Extension Samples](https://github.com/microsoft/vscode-webview-ui-toolkit-samples)
-- [Visual Studio Code Webview Guide](https://code.visualstudio.com/api/extension-guides/webview)
-- [Visual Studio Code Webview Guidelines](https://code.visualstudio.com/api/references/extension-guidelines#webviews)
-- [Visual Studio Code Extension API Docs](https://code.visualstudio.com/api)
+- [Webview API Guide](https://code.visualstudio.com/api/extension-guides/webview)
+- [Webview API Guidelines](https://code.visualstudio.com/api/references/extension-guidelines#webviews)
+- [Webview UX Guidelines](https://code.visualstudio.com/api/ux-guidelines/webviews)
+- [Extension API Docs](https://code.visualstudio.com/api)