Fix the packaged prompt path (#15)

Resolve the packaged prompt from the repository root after TypeScript moved into `src/`.

Adds a regression test that verifies every module-relative runtime asset exists. Root suite: 38 passed.

Reviewed-on: #15
Co-authored-by: Danny Kim <temeddix@gmail.com>
Co-committed-by: Danny Kim <temeddix@gmail.com>

src/run.ts

@@ -152,7 +152,7 @@ async function renderPrompt(
     ANCHORS_PATH: anchorsPath,
   };
   const template = await Deno.readTextFile(
-    new URL("prompt.md", import.meta.url),
+    new URL("../prompt.md", import.meta.url),
   );
   return {
     prompt: template.replace(