test: add E2E test infrastructure with sync, login, logout, whoami, and init tests

.env.test.example

@@ -0,0 +1,9 @@
+###############################################################################
+# The following environment variables are used to run tests.
+# Create a specific account for testing to avoid issues.
+###############################################################################
+
+# The email address for your Prismic account.
+E2E_PRISMIC_EMAIL=
+# The password to your Prismic account.
+E2E_PRISMIC_PASSWORD=

.github/workflows/prerelease-canary.yml

@@ -13,6 +13,8 @@ jobs:
   publish:
     if: github.repository_owner == 'prismicio'
     runs-on: ubuntu-latest
+    env:
+      MODE: production
     steps:
       - uses: actions/checkout@v6
       - uses: actions/setup-node@v6

.github/workflows/prerelease-pr.yml

@@ -11,6 +11,8 @@ jobs:
   publish:
     if: github.repository_owner == 'prismicio'
     runs-on: ubuntu-latest
+    env:
+      MODE: production
     steps:
       - uses: actions/checkout@v6
       - uses: actions/setup-node@v6

.github/workflows/release.yml

@@ -14,6 +14,8 @@ on:
 jobs:
   release-please:
     runs-on: ubuntu-latest
+    env:
+      MODE: production
     steps:
       - uses: googleapis/release-please-action@v4
         id: release

.github/workflows/validate.yml

@@ -16,6 +16,8 @@ jobs:
 
   build:
     runs-on: ubuntu-latest
+    env:
+      MODE: production
     steps:
       - uses: actions/checkout@v6
       - uses: actions/setup-node@v6