chore: update default AWS instance type from t3.xlarge to t3.medium

Clean code

Refactoring VMware Integration and Implementing AWS Support (#44) * Initailize aws support * Add README for the VM server * Refactor OSWorld for supporting more cloud services. * Initialize vmware and aws implementation v1, waiting for verification * Initlize files for azure, gcp and virtualbox support * Debug on the VMware provider * Fix on aws interface mapping * Fix instance type * Refactor * Clean * hk region; debug * Fix lock * Remove print * Remove key_name requirements when allocating aws vm * Clean README --------- Co-authored-by: XinyuanWangCS <xywang626@gmail.com>

Update AWS guidance

fix: correct IP address return logic in AWSProvider - Reverted the return value in the AWSProvider class to use private IP address instead of public IP address. - Ensured that the logic remains intact while addressing the specific requirement for VNC access.