implement json-patch for entity.

[gdlxSong]

steps

1. create an entity.

curl -X PUT "http://localhost:3500/v1.0/invoke/core/method/v1/plugins/abcd/entities/test123" \
  -H "Source: abcd" \
  -H "Owner: admin" \
  -H "Type: DEVICE" \
  -H "Content-Type: application/json" \
  -d '{
       "person": {
         "age": 22
       }
     }'

2. patch persion.age

curl -X PATCH "http://localhost:6789/v1/plugins/abcd/entities/test123" \
  -H "Source: abcd" \
  -H "Owner: admin" \
  -H "Type: DEVICE" \
  -H "Content-Type: application/json" \
  -d '[
    {
      "path": "person.age",
      "operator": "replace",
      "value": 20
    }
  ]'

3. query entity

curl -X GET "http://localhost:3500/v1.0/invoke/core/method/v1/plugins/abcd/entities/test123" \
  -H "Source: abcd" \
  -H "Owner: admin"  \
  -H "Type: DEVICE"