feat: nhl.com site

I was having trouble with the extant sites for this channel so I decided to add a source for the league's own guide. Unfortunately it's missing images since I don't know where they need to be hosted :(

sites/nhl.com/nhl.com.config.js

@@ -0,0 +1,45 @@
+const dayjs = require('dayjs')
+
+module.exports = {
+  site: 'nhl.com',
+  // I'm not sure what `endDate` represents but they only return 1 day of
+  // results, with `endTime`s ocassionally in the following day.
+  days: 1,
+  url: ({ date }) => `https://api-web.nhle.com/v1/network/tv-schedule/${date.toJSON().split("T")[0]}`,
+  parser({ content }) {
+    const programs = []
+    const items = parseItems(content)
+    for (const item of items) {
+      programs.push({
+        title: item.title,
+        description: item.description === item.title ? undefined : item.description,
+        category: item.title === "NHL Game" ? "Sports event" : "Sports non-event",
+        // image: parseImage(item),
+        start: parseStart(item),
+        stop: parseStop(item)
+      })
+    }
+
+    return programs
+  }
+}
+
+// Unfortunately I couldn't determine how these are
+// supposed to be formatted. Pointers appreciated!
+// function parseImage(item) {
+//   const uri = item.broadcastImageUrl
+
+//   return uri ? `https://???/${uri}` : null
+// }
+
+function parseStart(item) {
+  return dayjs(item.startTime)
+}
+
+function parseStop(item) {
+  return dayjs(item.endTime)
+}
+
+function parseItems(content) {
+  return JSON.parse(content).broadcasts
+}