Added initial webdriver tests (#1337)

Adds webdriver tests for testing from a users perspective via browser
actions. We currently support local test runners for a bunch of actions
on desktop `chrome`/`firefox`/`edge`/`safari` on macos.

We also have a browserstack runner which we'll enable in another PR.

### Release Note

- Adds initial webdriver tests

scripts/e2e-run-ci

@@ -0,0 +1,14 @@
+set -eux
+export ENABLE_SSL=1
+export ENABLE_NETWORK_CACHING=1
+yarn workspace @tldraw/tldraw prebuild
+SHELL=/bin/bash nohup yarn dev-webdriver &
+PROCCESS_PID="$!"
+
+mode="${1:-local}"
+sleep 5
+yarn workspace @tldraw/e2e "test:${mode}"
+exit_code=$?
+
+kill $PROCCESS_PID
+exit $exit_code

scripts/e2e-run-tests

@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+set -eux
+
+mode="${1:-local}"
+export BROWSERS="${2:-chrome}"
+# if [[ "$mode" == "remote" ]]; then
+#     export ENABLE_SSL=1
+# fi
+yarn workspace @tldraw/e2e "test:${mode}"

scripts/e2e-start-server

@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+set -eux
+yarn dev-webdriver