* new Intents API and notifier for intent sending
* OpenAPI for Intents API
* Add request body for Intents API POST
* reference request object correctly
* Intents API tests
* notifier tests for intent posting
* fix tests
* changes suggested by @jrobbins
* changes suggested by @jcscottiii
* Fix tests and add new ones
* mypy and test fix
* Changes suggested by @jcscottiii
* Use OpenAPI object to create response
* UI changes and paths for intent draft and posting
* changes suggested by @jrobbins
* lint-fix
* read subject from API response
* remove unused imports
* Move copy intent body event to @click
* Additional fixes
intents_api.py: Pass in `gate_id` for intent GET request to populate URL query string. Also, pass `sections_to_show` param for template rendering.
chromedash-intent-preview-page.js: When finding matching stage, search extension stages as well.
cs-client.js: Pass `gateId` in GET request.
notifier.py: Add APP_TITLE to populate intent template.
main.py: Update route for passing `gate_id` in GET request.
api.yaml: Add definition for `gate_id` in GET request.
Daniel Smith