Add Brave CDP automation, replace Oracle browser mode

Connects to user's running Brave via Chrome DevTools Protocol
to automate ChatGPT interaction. Uses puppeteer-core to open a
tab, send the prompt, wait for response, and extract the result.

No cookies, no separate profiles, no copy/paste. Just connects
to the browser where the user is already logged in.

One-time setup: relaunch Brave with --remote-debugging-port=9222

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

node_modules/proxy-from-env/.travis.yml

@@ -0,0 +1,10 @@
+language: node_js
+node_js:
+  - node
+  - lts/*
+script:
+  - npm run lint
+  # test-coverage will also run the tests, but does not print helpful output upon test failure.
+  # So we also run the tests separately.
+  - npm run test
+  - npm run test-coverage && cat coverage/lcov.info | ./node_modules/.bin/coveralls && rm -rf coverage