API: impl some BrowserContext and add tests/docs

Author: coreyti

.envrc

@@ -5,7 +5,7 @@ export REPO="$(expand_path .)"
 export ERL_AFLAGS="-kernel shell_history enabled" # persistent iex history
 
 # default: true
-# export PLAYWRIGHT_HEADLESS=false
+export PLAYWRIGHT_HEADLESS=false
 
 # default transport: driver (websocket is the one alternative)
 # export PLAYWRIGHT_TRANSPORT=websocket

lib/playwright/browser.ex

@@ -239,7 +239,7 @@ defmodule Playwright.Browser do
 
   ### Option: `:video_size`
 
-  > #### DEPRECATED {: .warn}
+  > #### DEPRECATED {: .warning}
   >
   > Use `:record_video` instead.
 
@@ -254,7 +254,7 @@ defmodule Playwright.Browser do
 
   ### Option: `:videos_path`
 
-  > #### DEPRECATED {: .warn}
+  > #### DEPRECATED {: .warning}
   >
   > Use `:record_video` instead.