Use veggie emojis to represent problem difficulties in PotD message (#507)

I want to give some insight into the problem difficulty but hard is just a label! Vegetable emojis seem like a fun way to handle this.

Author: miorel

workspaces/post-leetcode-potd-to-discord/README.md

@@ -59,7 +59,7 @@ To use:
    <!-- prettier-ignore-start -->
    <!-- The two spaces at the end of the next line are intentional and necessary for rendering a single line break. -->
 
-   > ✨ New LeetCode problem of the day: [1460. Make Two Arrays Equal by Reversing Subarrays](https://leetcode.com/problems/make-two-arrays-equal-by-reversing-subarrays/) (marked Easy) ✨
+   > New LeetCode problem of the day: 🥦 [1460. Make Two Arrays Equal by Reversing Subarrays](https://leetcode.com/problems/make-two-arrays-equal-by-reversing-subarrays/) 🥦
    >
    > ##### Problem due: ⏳ in 20 hours ⏳
 

workspaces/post-leetcode-potd-to-discord/src/getPotdMessage.ts

@@ -6,15 +6,25 @@ import { yearMonthDayToTimestampInSeconds } from "@code-chronicles/util/yearMont
 
 import { formatTimestampForDiscord } from "./formatTimestampForDiscord.ts";
 
+const EMOJI_FOR_DIFFICULTY: Record<
+  ActiveDailyCodingChallengeQuestion["question"]["difficulty"],
+  string
+> = {
+  Easy: "🥦",
+  Medium: "🥕",
+  Hard: "🌶️",
+};
+
 // TODO: jest tests
 export function getPotdMessage({
   date,
   question: { difficulty, questionFrontendId, title, titleSlug },
 }: ActiveDailyCodingChallengeQuestion): string {
   const link = `https://leetcode.com/problems/${titleSlug}/`;
+  const emoji = EMOJI_FOR_DIFFICULTY[difficulty];
 
   return dedent`
-    ✨ New LeetCode problem of the day: [${questionFrontendId}. ${title}](${link}) (marked ${difficulty}) ✨
+    New LeetCode problem of the day: ${emoji} [${questionFrontendId}. ${title}](${link}) ${emoji}
 
     -# Problem due: ⏳ **${formatTimestampForDiscord(yearMonthDayToTimestampInSeconds(date) + SEC_IN_DAY, "R")}** ⏳
   `;