Migrate CLI E2E tests to Node.js 26

Run the CLI subprocess suites and benchmark tools as native TypeScript with
node:test, and move them under test/e2e-cli.

Update CI and Compose runners, run local smoke tests on Linux, macOS, and
Windows, and collect source-mapped CLI coverage with c8.

test/e2e-cli/.test.env

@@ -0,0 +1,9 @@
+hostname=http://127.0.0.1:5989/
+dbname=livesync-test-db-ci
+username=admin
+password=testpassword
+minioEndpoint=http://127.0.0.1:9000
+accessKey=minioadmin
+secretKey=minioadmin
+bucketName=livesync-test-bucket-ci
+LIVESYNC_TEST_TEE=1