feat(Pull Request): Additions and Deletions

[NickHackman]

This PR adds 2 new fields to a Pull Requests of Additions and Deletions

docs: https://docs.github.com/en/graphql/reference/objects#pullrequest

Use Cases

• Determining code churn
• Determining PR size and helping promote better PR practices by keeping PR size small

[CLAassistant]

All committers have signed the CLA.

[NickHackman]

Additions/Deletions by Day

Panel JSON

{
  "datasource": {
    "uid": "ae6qd8evnl1xcd",
    "type": "grafana-github-datasource"
  },
  "type": "barchart",
  "title": "Additions and Deletions",
  "gridPos": {
    "x": 0,
    "y": 0,
    "w": 12,
    "h": 8
  },
  "id": 3,
  "targets": [
    {
      "datasource": {
        "type": "grafana-github-datasource",
        "uid": "ae6qd8evnl1xcd"
      },
      "refId": "A",
      "queryType": "Pull_Requests",
      "owner": "grafana",
      "options": {
        "query": "is:merged archived:false",
        "timeField": 2
      }
    }
  ],
  "options": {
    "orientation": "auto",
    "xTickLabelRotation": 0,
    "xTickLabelSpacing": 0,
    "showValue": "auto",
    "stacking": "normal",
    "groupWidth": 0.7,
    "barWidth": 0.97,
    "barRadius": 0,
    "fullHighlight": false,
    "tooltip": {
      "mode": "single",
      "sort": "none"
    },
    "legend": {
      "showLegend": true,
      "displayMode": "list",
      "placement": "bottom",
      "calcs": []
    }
  },
  "transformations": [
    {
      "id": "convertFieldType",
      "options": {
        "fields": {},
        "conversions": [
          {
            "targetField": "merged_at",
            "destinationType": "string",
            "dateFormat": "YYYY-MM-DD"
          }
        ]
      }
    },
    {
      "id": "sortBy",
      "options": {
        "fields": {},
        "sort": [
          {
            "field": "merged_at"
          }
        ]
      }
    },
    {
      "id": "groupBy",
      "options": {
        "fields": {
          "merged_at": {
            "aggregations": [],
            "operation": "groupby"
          },
          "additions": {
            "aggregations": [
              "sum"
            ],
            "operation": "aggregate"
          },
          "deletions": {
            "aggregations": [
              "sum"
            ],
            "operation": "aggregate"
          }
        }
      }
    },
    {
      "id": "organize",
      "options": {
        "excludeByName": {},
        "indexByName": {},
        "renameByName": {
          "additions (sum)": "Additions",
          "deletions (sum)": "Deletions"
        },
        "includeByName": {}
      }
    }
  ],
  "fieldConfig": {
    "defaults": {
      "custom": {
        "lineWidth": 1,
        "fillOpacity": 80,
        "gradientMode": "none",
        "axisPlacement": "auto",
        "axisLabel": "Additions/Deletions",
        "axisColorMode": "text",
        "axisBorderShow": false,
        "scaleDistribution": {
          "type": "linear"
        },
        "axisCenteredZero": false,
        "hideFrom": {
          "tooltip": false,
          "viz": false,
          "legend": false
        },
        "thresholdsStyle": {
          "mode": "off"
        },
        "axisSoftMin": 0
      },
      "color": {
        "mode": "palette-classic"
      },
      "mappings": [],
      "thresholds": {
        "mode": "absolute",
        "steps": [
          {
            "value": null,
            "color": "green"
          },
          {
            "value": 80,
            "color": "red"
          }
        ]
      }
    },
    "overrides": [
      {
        "matcher": {
          "id": "byName",
          "options": "Deletions"
        },
        "properties": [
          {
            "id": "color",
            "value": {
              "mode": "fixed",
              "fixedColor": "red"
            }
          }
        ]
      },
      {
        "matcher": {
          "id": "byName",
          "options": "Additions"
        },
        "properties": [
          {
            "id": "color",
            "value": {
              "mode": "fixed",
              "fixedColor": "green"
            }
          }
        ]
      }
    ]
  }
}