[GATWEAY] Standardization Pixiu's err report and code

[nanjiek]

Title: Enhancements and Standardization Required for Pixiu

Pixiu still needs some PRs to improve:

1. Issue: The prefix used when logging is not standardized. Some parts of the code use pixiugatewaycmd, while others use dubbo-go-pixiu.

   • PR 1: Standardize the logging prefix to pixiu across the project.

2. Issue: There is no standardized error descriptor. Error descriptors are inconsistent across Pixiu, and there is no standard format for error messages and descriptions.

   • PR 2: Standardize the error description text format for all errors in Pixiu.

3. Issue: The methods for handling replenishment errors vary. Some errors are panicked, while others are just logged.

   • PR 3: Define and implement error handling guidelines (when to panic vs. when to log).