chore: run tsc properly (#8884)

Runs type check as part of the CI. This needs a new path alias in the tsconfig so that TS resolves the svelte import in the ambient file directly to the correct d.ts file and doesn't load Svelte through the node_modules, at which point it would load the generated ambient type definitions and throw a duplicate definitions error.

Also removes a tgz that was accidentally added

.github/workflows/ci.yml

@@ -7,7 +7,7 @@ permissions:
   contents: read # to fetch code (actions/checkout)
 
 env:
-  # We only install Chromium manually 
+  # We only install Chromium manually
   PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD: '1'
 
 jobs:

package.json

@@ -9,7 +9,7 @@
     "build": "pnpm -r --filter=./packages/* build",
     "build:sites": "pnpm -r --filter=./sites/* build",
     "check": "cd packages/svelte && pnpm build && cd ../../ && pnpm -r check",
-    "lint": "pnpm -r lint",
+    "lint": "cd packages/svelte && pnpm build && cd ../../ && pnpm -r lint",
     "format": "pnpm -r format",
     "changeset:version": "changeset version && pnpm -r generate:version && git add --all",
     "changeset:publish": "changeset publish"

packages/svelte/package.json

@@ -74,15 +74,15 @@
   "types": "types/index.d.ts",
   "scripts": {
     "format": "prettier . --cache --plugin-search-dir=. --write",
-    "check": "prettier . --cache --plugin-search-dir=. --check",
+    "check": "tsc --noEmit",
     "test": "vitest run && echo \"manually check that there are no type errors in test/types by opening the files in there\"",
     "build": "rollup -c && pnpm types",
     "generate:version": "node ./scripts/generate-version.js",
     "dev": "rollup -cw",
     "posttest": "agadoo src/internal/index.js",
     "prepublishOnly": "pnpm build",
     "types": "node ./scripts/generate-dts.js",
-    "lint": "eslint \"{src,test}/**/*.{ts,js}\" --cache"
+    "lint": "prettier . --cache --plugin-search-dir=. --check && eslint \"{src,test}/**/*.{ts,js}\" --cache"
   },
   "repository": {
     "type": "git",

packages/svelte/tsconfig.json

@@ -35,6 +35,9 @@
 		"noImplicitThis": true,
 		"noUnusedLocals": true,
 		"noUnusedParameters": true,
-		"typeRoots": ["./node_modules/@types"]
+		"typeRoots": ["./node_modules/@types"],
+		"paths": {
+			"svelte": ["./src/runtime/public.d.ts"]
+		}
 	}
 }