Assemblies: Load outside files into project via point-and-click (#6217)

* WIP: Add point-and-click Import for geometry
Will eventually fix #6120
Right now the whole loop is there but the codemod doesn't work yet

* Better pathToNOde, log on non-working cm dispatch call

* Add workaround to updateModelingState not working

* Back to updateModelingState with a skip flag

* Better todo

* Change working from Import to Insert, cleanups

* Sister command in kclCommands to populate file options

* Improve path selector

* Unsure: move importAstMod to kclCommands onSubmit 😶

* Add e2e test

* Clean up for review

* Add native file menu entry and test

* No await yo lint said so

* WIP: UX improvements around foreign file imports
Fixes #6152

* @lrev-Dev's suggestion to remove a comment

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

* Update to scene.settled(cmdBar)

* Add partNNN default name for alias

* Lint

* Lint

* Fix unit tests

* Add sad path insert test
Thanks @Irev-Dev for the suggestion

* Add step insert test

* Lint

* Add test for second foreign import thru file tree click

* WIP: Add point-and-click Load to copy files from outside the project into the project
Towards #6210

* Move Insert button to modeling toolbar, update menus and toolbars

* Add default value for local name alias

* Aligning tests

* Fix tests

* Add padding for filenames starting with a digit

* Lint

* Lint

* Update snapshots

* Merge branch 'main' into pierremtb/issue6210-Add-point-and-click-Load-to-copy-files-from-outside-the-project-into-the-project

* Add disabled transform subbutton

* Merge kcl-samples and local disk load into one 'Load external model' command

* Fix em tests

* Fix test

* Add test for file pick import, better input

* Fix non .kcl loading

* Lint

* Update snapshots

* Fix issue leading to test failure

* Fix clone test

* Add note

* Fix nested clone issue

* Clean up for review

* Add valueSummary for path

* Fix test after path change

* Clean up for review

* Update src/lib/kclCommands.ts

Thanks @franknoirot!

Co-authored-by: Frank Noirot <frank@zoo.dev>

* Improve path input arg

* Fix tests

* Merge branch 'main' into pierremtb/issue6210-Add-point-and-click-Load-to-copy-files-from-outside-the-project-into-the-project

* Fix path header not showing and improve tests

* Clean up

---------

Co-authored-by: Kurt Hutten <k.hutten@protonmail.ch>
Co-authored-by: Frank Noirot <frank@zoo.dev>

e2e/playwright/fixtures/toolbarFixture.ts

@@ -27,6 +27,7 @@ export class ToolbarFixture {
   offsetPlaneButton!: Locator
   helixButton!: Locator
   startSketchBtn!: Locator
+  insertButton!: Locator
   lineBtn!: Locator
   tangentialArcBtn!: Locator
   circleBtn!: Locator
@@ -44,7 +45,7 @@ export class ToolbarFixture {
   featureTreePane!: Locator
   gizmo!: Locator
   gizmoDisabled!: Locator
-  insertButton!: Locator
+  loadButton!: Locator
 
   constructor(page: Page) {
     this.page = page
@@ -59,6 +60,7 @@ export class ToolbarFixture {
     this.offsetPlaneButton = page.getByTestId('plane-offset')
     this.helixButton = page.getByTestId('helix')
     this.startSketchBtn = page.getByTestId('sketch')
+    this.insertButton = page.getByTestId('insert')
     this.lineBtn = page.getByTestId('line')
     this.tangentialArcBtn = page.getByTestId('tangential-arc')
     this.circleBtn = page.getByTestId('circle-center')
@@ -68,6 +70,7 @@ export class ToolbarFixture {
     this.fileTreeBtn = page.locator('[id="files-button-holder"]')
     this.createFileBtn = page.getByTestId('create-file-button')
     this.treeInputField = page.getByTestId('tree-input-field')
+    this.loadButton = page.getByTestId('load-external-model-pane-button')
 
     this.filePane = page.locator('#files-pane')
     this.featureTreePane = page.locator('#feature-tree-pane')
@@ -79,8 +82,6 @@ export class ToolbarFixture {
     // element or two different elements can represent these states.
     this.gizmo = page.getByTestId('gizmo')
     this.gizmoDisabled = page.getByTestId('gizmo-disabled')
-
-    this.insertButton = page.getByTestId('insert-pane-button')
   }
 
   get logoLink() {