Fix playwright mental model, don't make me psycho, thanks (#5680)

* Fix flakey tests with new toolbar.exitSketch

* tsc && lint && fmt

* Disable pw electron thing again

* Unfrig Playwright-Electron a ton; fix another ton of flakes.

* More deflaky

* Fix a ton of tests and playwright related hell

* Run jess's magic incantation to build rust kcl things

* yarn tsc

* yarn lint

* yarn fmt

* Remove double logs

* Revert to old settings spreads momentarily

* Expect error *in the fixtureSetup*, does not circumvent typechecking for regular usage

* Fix unit tests

package.json

@@ -106,7 +106,7 @@
     "files:flip-to-nightly:windows": "./scripts/flip-files-to-nightly.ps1",
     "files:invalidate-bucket": "./scripts/invalidate-files-bucket.sh",
     "files:invalidate-bucket:nightly": "./scripts/invalidate-files-bucket.sh --nightly",
-    "postinstall": "./node_modules/.bin/electron-rebuild",
+    "postinstall": "yarn --cwd ./rust/kcl-language-server --modules-folder node_modules install && ./node_modules/.bin/electron-rebuild",
     "make:dev": "make dev",
     "generate:machine-api": "npx openapi-typescript ./openapi/machine-api.json -o src/lib/machine-api.d.ts",
     "generate:samples-manifest": "cd public/kcl-samples && node generate-manifest.js",