Add playwright/cypress/puppeteer code dumping

[christopherhwood]

why

This adds support for a popular request to be able to dump the stagehand actions taken during a session as playwright code (and adds support for outputting as cypress or puppeteer + either typescript or python as well)

what changed

Added a new ActionRecorder which functions just like a cache except it resets state every time it is initialized (to try to only hold the state from a single session).

The actions from this cache are then converted into playwright code via some hard-coded rules in a newly added testCodeGenerator.ts file.

If the user requests for cypress or puppeteer then we invoke a call to the LLM to convert the playwright code into the other test format.

test plan

Added a new example 2048_recorder.ts. It functions the same as the original 2048 example, except the game loop only loops once, the recorder is enabled, the original code to invoke a playwright function that does a keypress is replaced with a call to stagehand.act, and at the end of the example we dump the playwright code in typescript to the console.

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Latest commit: 0253e1b

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[kamath]

boom!!! thanks so much for this, will take a look shortly