Allow multiple source CSV files for normalisation. Implement real model node. Add normalizarion prompt. Implement normalization setup. Start on RAG retreival functions

agent/prompts/hydratePrompt.ts

@@ -0,0 +1,9 @@
+import fs from "fs";
+
+export function hydratePrompt(path: string, replacement: string) {
+    // TODO: expand into full context-based replacement engine
+
+    let raw = fs.readFileSync("prompts/" + path, "utf-8");
+
+    return raw.replace("###", replacement)
+}