chore(api): add swagger docs for undocumented API parameters

Add documentation for undocumented API parameters across multiple endpoints:

System:
- POST /libpod/system/prune: all, volumes, external, build, filters

Pods:
- DELETE /libpod/pods/{name}: timeout
- GET /libpod/pods/stats: stream, delay

Volumes:
- DELETE /volumes/{name}: timeout
- DELETE /libpod/volumes/{name}: timeout

Containers:
- GET /libpod/containers/stats: all
- POST /libpod/containers/{name}/restart: timeout
- POST /libpod/containers/{name}/resize: running

Images:
- POST /images/create: retry, retryDelay
- GET /images/json: shared-size

Exec:
- POST /libpod/exec/{id}/resize: running

Generate:
- GET /libpod/generate/{name}/systemd: templateUnitFile

Signed-off-by: Tim Zhou <[email protected]>