Starting to modularize into separate cli / server packages. (#55)

* Starting to move a lot of code into packages/server

* More of the massive refactor, builds and runs, some issues though.

* Fixing outstanding issue with double messages.

* Fixing a minor UI issue.

* Fixing the build post-merge.

* Running formatting.

* Addressing comments.

packages/server/src/config/config.ts

@@ -0,0 +1,65 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import * as dotenv from 'dotenv';
+import * as fs from 'node:fs';
+import * as path from 'node:path';
+import process from 'node:process';
+
+export class Config {
+  private apiKey: string;
+  private model: string;
+  private targetDir: string;
+
+  constructor(apiKey: string, model: string, targetDir: string) {
+    this.apiKey = apiKey;
+    this.model = model;
+    this.targetDir = targetDir;
+  }
+
+  getApiKey(): string {
+    return this.apiKey;
+  }
+
+  getModel(): string {
+    return this.model;
+  }
+
+  getTargetDir(): string {
+    return this.targetDir;
+  }
+}
+
+function findEnvFile(startDir: string): string | null {
+  let currentDir = path.resolve(startDir);
+  while (true) {
+    const envPath = path.join(currentDir, '.env');
+    if (fs.existsSync(envPath)) {
+      return envPath;
+    }
+    const parentDir = path.dirname(currentDir);
+    if (parentDir === currentDir || !parentDir) {
+      return null;
+    }
+    currentDir = parentDir;
+  }
+}
+
+export function loadEnvironment(): void {
+  const envFilePath = findEnvFile(process.cwd());
+  if (!envFilePath) {
+    return;
+  }
+  dotenv.config({ path: envFilePath });
+}
+
+export function createServerConfig(
+  apiKey: string,
+  model: string,
+  targetDir: string,
+): Config {
+  return new Config(apiKey, model, path.resolve(targetDir));
+}