feat(repo): migrate build system to tsdown for proper ESM/CJS support

.github/workflows/ci-supabase-js.yml

@@ -110,6 +110,42 @@ jobs:
           parallel-finished: true
           fail-on-error: false
         continue-on-error: true
+
+  module-resolution:
+    name: Module Resolution Tests
+    runs-on: ubuntu-latest
+    needs: build-package
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          filter: tree:0
+          fetch-depth: 0
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ env.NODE_VERSION }}
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Download build artifacts
+        uses: actions/download-artifact@v4
+        with:
+          name: packages-dist
+          path: ./packages/core
+
+      - name: Validate package exports (attw)
+        run: npx nx test:exports supabase-js
+
+      - name: Test ESM imports
+        run: npx nx test:esm supabase-js
+
+      - name: Test CJS requires
+        run: npx nx test:cjs supabase-js
+
   deno-tests:
     name: Deno Tests
     runs-on: ubuntu-latest

nx.json

@@ -50,6 +50,7 @@
       "{projectRoot}/webpack.config.[jt]s",
       "{projectRoot}/vite.config.[jt]s",
       "{projectRoot}/rollup.config.[jt]s",
+      "{projectRoot}/tsdown.config.[jt]s",
       "{projectRoot}/tsconfig*.json",
       "{projectRoot}/package.json",
       "sharedGlobals"
@@ -74,30 +75,6 @@
       "cache": true,
       "outputs": ["{projectRoot}/dist"]
     },
-    "build:main": {
-      "inputs": ["production", "^production", "buildConfig"],
-      "dependsOn": ["^build:main"],
-      "cache": true,
-      "outputs": ["{projectRoot}/dist/main", "{projectRoot}/dist/tsconfig.tsbuildinfo"]
-    },
-    "build:module": {
-      "inputs": ["production", "^production", "buildConfig"],
-      "dependsOn": ["^build:module"],
-      "cache": true,
-      "outputs": ["{projectRoot}/dist/module", "{projectRoot}/dist/tsconfig.module.tsbuildinfo"]
-    },
-    "build:umd": {
-      "inputs": ["production", "^production", "buildConfig"],
-      "dependsOn": ["^build:umd"],
-      "cache": true,
-      "outputs": ["{projectRoot}/dist/umd"]
-    },
-    "webpack:build": {
-      "inputs": ["production", "^production", "buildConfig"],
-      "dependsOn": ["^webpack:build"],
-      "cache": true,
-      "outputs": ["{projectRoot}/dist"]
-    },
     "test": {
       "inputs": ["testing", "^production"],
       "dependsOn": ["^build"],
@@ -106,7 +83,7 @@
     },
     "test:types": {
       "inputs": ["testing", "^production"],
-      "dependsOn": ["build:module"],
+      "dependsOn": ["build"],
       "cache": true,
       "outputs": []
     },