feat: client and server logic to manage announcements (#3)

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### Issue

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### Attestations

- [x] I have read and agree to the [Code of Conduct](https://docs.nhcarrigan.com/community/coc/)
- [x] I have read and agree to the [Community Guidelines](https://docs.nhcarrigan.com/community/guide/).
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### Dependencies

- [x] I have pinned the dependencies to a specific patch version.

### Style

- [x] I have run the linter and resolved any errors.
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### Tests

- [ ] My contribution adds new code, and I have added tests to cover it.
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Reviewed-on: #3
Co-authored-by: Naomi Carrigan <commits@nhcarrigan.com>
Co-committed-by: Naomi Carrigan <commits@nhcarrigan.com>

server/src/modules/announceOnForum.ts

@@ -0,0 +1,40 @@
+/**
+ * @copyright nhcarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+/* eslint-disable @typescript-eslint/naming-convention -- we are making raw API calls. */
+/**
+ * Forwards an announcement to our Discord server.
+ * @param title - The title of the announcement.
+ * @param content - The main body of the announcement.
+ * @param type - Whether the announcement is for a product or community.
+ * @returns A message indicating the success or failure of the operation.
+ */
+export const announceOnForum = async(
+  title: string,
+  content: string,
+  type: "products" | "community",
+): Promise<string> => {
+  const forumRequest = await fetch(
+    `https://forum.nhcarrigan.com/posts.json`,
+    {
+      body: JSON.stringify({
+        category: 14,
+        raw:      content,
+        tags:     [ type ],
+        title:    title,
+      }),
+      headers: {
+        "Api-Key":      process.env.FORUM_API_KEY ?? "",
+        "Api-Username": "Hikari",
+        "Content-Type": "application/json",
+      },
+      method: "POST",
+    },
+  );
+  if (forumRequest.status !== 200) {
+    return "Failed to send message to forum.";
+  }
+  return "Successfully sent message to forum.";
+};