feat(plugins/calendar): add new plugin (#1013) [skip ci]

tests/mocks/api/github/graphql/calendar.default.mjs

@@ -0,0 +1,32 @@
+/**Mocked data */
+export default function({faker, query, login = faker.internet.userName()}) {
+  console.debug("metrics/compute/mocks > mocking graphql api result > calendar/default")
+  //Generate calendar
+  const date = new Date(query.match(/from: "(?<date>\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}.\d{3}Z)"/)?.groups?.date)
+  const to = new Date(query.match(/to: "(?<date>\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}.\d{3}Z)"/)?.groups?.date)
+  const weeks = []
+  let contributionDays = []
+  for (; date <= to; date.setDate(date.getDate() + 1)) {
+    //Create new week on sunday
+    if (date.getDay() === 0) {
+      weeks.push({contributionDays})
+      contributionDays = []
+    }
+    //Random contributions
+    const contributionCount = Math.min(10, Math.max(0, faker.datatype.number(14) - 4))
+    contributionDays.push({
+      contributionCount,
+      color: ["#ebedf0", "#9be9a8", "#40c463", "#30a14e", "#216e39"][Math.ceil(contributionCount / 10 / 0.25)],
+      date: date.toISOString().substring(0, 10),
+    })
+  }
+  return ({
+    user: {
+      calendar: {
+        contributionCalendar: {
+          weeks,
+        },
+      },
+    },
+  })
+}