refactor(telegram): keep the bare help and greeting words in a per-locale table

The two word lists lived inside the webhook handler and had no entry
for Dutch or Korean. They move to their own module, keyed by locale so
the compiler names a language that has none, and gain "hulp", "hoi",
"goedemorgen", "도움말", "도움", "안녕" and "안녕하세요" beside the
Portuguese words. The bot still matches the union on the folded text.

src/app/api/telegram/webhook/__tests__/route.test.ts

@@ -566,6 +566,9 @@ describe("Telegram webhook — text-message dispatch", () => {
     ["ayuda", 213],
     ["aiuto", 214],
     ["Pomoc", 215],
+    ["hulp", 217],
+    ["도움말", 218],
+    ["Ajuda", 219],
   ])("answers the bare help word %s", async (word, updateId) => {
     const res = await POST(
       tgRequest({
@@ -602,6 +605,9 @@ describe("Telegram webhook — text-message dispatch", () => {
     ["Hola", 221],
     ["ciao", 222],
     ["cześć", 223],
+    ["Hoi", 224],
+    ["안녕하세요", 225],
+    ["Olá", 226],
   ])("answers the greeting %s", async (word, updateId) => {
     const res = await POST(
       tgRequest({