Enhance the environment variable functionality of the service

Configuring environment variables for services is very convenient, especially when switching between environments. However, the biggest drawback at present is that each service needs to be configured again, which can be very troublesome when there are many modules.

I hope to achieve the following enhancements:

1. Default environment variables can be configured at the workspace level (which can be merged and overwritten with environment variables configured by the service)

2. Creating a git working tree can carry these configurations to the new working tree