Migrate end-to-end tests from Cypress to Playwright

.gitignore

@@ -5,4 +5,8 @@
 /test/index.js
 /test/index.d.ts
 /coverage
-/.nyc_output
+/.nyc_output
+/test-results/
+/playwright-report/
+/blob-report/
+/playwright/.cache/

.hass/config/configuration.yaml

@@ -22,4 +22,4 @@ lovelace:
 # Load frontend themes from the themes folder
 frontend:
   themes: !include_dir_merge_named themes
-  extra_module_url: /local/home-assistant-query-selector-tests.js
+  extra_module_url: /local/home-assistant-query-selector.js

README.md

@@ -16,8 +16,14 @@ This is from where the idea of `home-assistant-query-selector` comes from. Imagi
 
 There are exhaustive end-to-end tests in place in this library, when a new version of `Home Assistant` is released, running the end-to-end tests in this repository will ensure that the library still works with the new version, so no need to manually check this.
 
+#### End-to-end tests
+
 ![end-to-end tests](https://raw.githubusercontent.com/elchininet/home-assistant-query-selector/master/images/tests.png)
 
+#### Code coverage
+
+![code-coverage](https://raw.githubusercontent.com/elchininet/home-assistant-query-selector/master/images/coverage.png)
+
 ### Code example
 
 More details of the API can be consulted in [the API section](#api):