Add ability to open KCL samples in-app (#3912)

* Add a shell script to get the list of KCL samples into the app

* Add support for overwriting current file with sample

* Move these KCL commands down into FileMachineProvider

* Add support for creating a new file on desktop

* Make it so these files aren't set to "renaming mode" right away

* Add support for initializing default values that are functions

* Add E2E tests

* Add a code menu item to load a sample

* Fix tsc issues

* Remove `yarn fetch:samples` from `yarn postinstall`

* Remove change to arg initialization logic, I was holding it wrong

* Switch to use new manifest file from kcl-samples repo

* Update tests now that we use proper sample titles

* Remove double-load from units menu test

* @jtran feedback

* Don't encode `https://` that's silly

* fmt

* Update e2e/playwright/testing-samples-loading.spec.ts

Co-authored-by: Kurt Hutten <k.hutten@protonmail.ch>

* Test feedback

* Add a test step to actually check the file contents were written to (@Irev-Dev feedback)

---------

Co-authored-by: Kurt Hutten <k.hutten@protonmail.ch>

src/components/ModelingSidebar/ModelingPanes/KclEditorMenu.tsx

@@ -9,10 +9,12 @@ import { FontAwesomeIcon } from '@fortawesome/react-fontawesome'
 import { kclManager } from 'lib/singletons'
 import { openExternalBrowserIfDesktop } from 'lib/openWindow'
 import { reportRejection } from 'lib/trap'
+import { useCommandsContext } from 'hooks/useCommandsContext'
 
 export const KclEditorMenu = ({ children }: PropsWithChildren) => {
   const { enable: convertToVarEnabled, handleClick: handleConvertToVarClick } =
     useConvertToVariable()
+  const { commandBarSend } = useCommandsContext()
 
   return (
     <Menu>
@@ -77,6 +79,22 @@ export const KclEditorMenu = ({ children }: PropsWithChildren) => {
               </small>
             </a>
           </Menu.Item>
+          <Menu.Item>
+            <button
+              onClick={() => {
+                commandBarSend({
+                  type: 'Find and select command',
+                  data: {
+                    groupId: 'code',
+                    name: 'open-kcl-example',
+                  },
+                })
+              }}
+              className={styles.button}
+            >
+              <span>Load a sample model</span>
+            </button>
+          </Menu.Item>
           <Menu.Item>
             <a
               className={styles.button}
@@ -85,7 +103,7 @@ export const KclEditorMenu = ({ children }: PropsWithChildren) => {
               rel="noopener noreferrer"
               onClick={openExternalBrowserIfDesktop()}
             >
-              <span>KCL samples</span>
+              <span>View all samples</span>
               <small>
                 zoo.dev
                 <FontAwesomeIcon