Update README.md to add usage instructions for vllm serving with GLM4V model,...

Update README.md to add usage instructions for vllm serving with GLM4V model, including command syntax and template details.
6 jobs for main
Status Job ID Name Coverage
  Build
canceled #20149
build

 
  Test
canceled #20152
allowed to fail
bandit-sast

canceled #20151
allowed to fail
code_quality

canceled #20154
allowed to fail
secret_detection

canceled #20153
allowed to fail
semgrep-sast

canceled #20150
test