✨ Add howto function and update metadata for new script file

This change introduces a new asynchronous `howto` function in `deno-ai-mod.ts` that fetches command-line how-to summaries, modifies existing functions to use a new `getBearerToken` utility, and adds metadata for the new `howto.ts` script in `script-meta-v2.json`.

libraries/deno-ai-mod.ts

@@ -5,6 +5,32 @@ import {
     term,
 } from "https://script.hatter.ink/@67/deno-commons-mod.ts";
 
+export async function howto(message: string): Promise<string> {
+    const response = await fetchDataWithTimeout(
+        "https://hatter.ink/ai/command-line-howto.json",
+        {
+            method: "POST",
+            headers: {
+                "Authorization": await getBearerToken(
+                    "ai-command-line-howto-token",
+                ),
+            },
+            body: new URLSearchParams({
+                "message": message,
+            }),
+        },
+    );
+    if (response.status != 200) {
+        console.log(
+            term.yellow(
+                `Howto command line failed, status: ${response.status}`,
+            ),
+        );
+        return null;
+    }
+    return (await response.json())["data"]["summary"];
+}
+
 export async function summarizeGitStatusDiff(): Promise<string> {
     const gitStatus = (await execCommand("git", ["status"]))
         .assertSuccess().getStdoutAsStringThenTrim();
@@ -15,8 +41,9 @@ export async function summarizeGitStatusDiff(): Promise<string> {
         {
             method: "POST",
             headers: {
-                "Authorization": "Bearer " +
-                    await getSecretValue("ai-commit-summarize-token"),
+                "Authorization": await getBearerToken(
+                    "ai-commit-summarize-token",
+                ),
             },
             body: new URLSearchParams({
                 "gitStatus": gitStatus,
@@ -34,3 +61,7 @@ export async function summarizeGitStatusDiff(): Promise<string> {
     }
     return (await response.json())["data"]["summary"];
 }
+
+async function getBearerToken(token: string): Promise<string> {
+    return "Bearer " + await getSecretValue(token);
+}