add cli test

tests/test_cli/conf/conf.py

 import os
 conf = {
-"code_path": os.environ.get('CI_PROJECT_DIR'),
-"pdf_dev_path" : os.environ.get('CI_PROJECT_DIR') + "/tests/pdf_dev",
+"code_path": os.environ.get('GITHUB_WORKSPACE'),
+"pdf_dev_path" : os.environ.get('GITHUB_WORKSPACE') + "/tests/pdf_dev",
 "pdf_res_path": "/home/quyuan/code/Magic-PDF/Magic-PDF/Magic-PDF/data"
 
 }