Add CLI package, config file support, and workspace setup

Add cli/ package with initial scaffolding. Add config-schema to shared
package for typed configuration. Add server config-file loader for
paperclip.config.ts support. Register cli in pnpm workspace. Add
.paperclip/ and .pnpm-store/ to gitignore. Minor Companies page fix.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/src/config-file.ts

@@ -0,0 +1,18 @@
+import fs from "node:fs";
+import path from "node:path";
+import { paperclipConfigSchema, type PaperclipConfig } from "@paperclip/shared";
+
+export function readConfigFile(): PaperclipConfig | null {
+  const configPath = process.env.PAPERCLIP_CONFIG
+    ? path.resolve(process.env.PAPERCLIP_CONFIG)
+    : path.resolve(process.cwd(), ".paperclip/config.json");
+
+  if (!fs.existsSync(configPath)) return null;
+
+  try {
+    const raw = JSON.parse(fs.readFileSync(configPath, "utf-8"));
+    return paperclipConfigSchema.parse(raw);
+  } catch {
+    return null;
+  }
+}

server/src/config.ts

@@ -1,3 +1,5 @@
+import { readConfigFile } from "./config-file.js";
+
 export interface Config {
   port: number;
   databaseUrl: string | undefined;
@@ -7,10 +9,20 @@ export interface Config {
 }
 
 export function loadConfig(): Config {
+  const fileConfig = readConfigFile();
+
+  const fileDbUrl =
+    fileConfig?.database.mode === "postgres"
+      ? fileConfig.database.connectionString
+      : undefined;
+
   return {
-    port: Number(process.env.PORT) || 3100,
-    databaseUrl: process.env.DATABASE_URL,
-    serveUi: process.env.SERVE_UI === "true",
+    port: Number(process.env.PORT) || fileConfig?.server.port || 3100,
+    databaseUrl: process.env.DATABASE_URL ?? fileDbUrl,
+    serveUi:
+      process.env.SERVE_UI !== undefined
+        ? process.env.SERVE_UI === "true"
+        : fileConfig?.server.serveUi ?? false,
     heartbeatSchedulerEnabled: process.env.HEARTBEAT_SCHEDULER_ENABLED !== "false",
     heartbeatSchedulerIntervalMs: Math.max(10000, Number(process.env.HEARTBEAT_SCHEDULER_INTERVAL_MS) || 30000),
   };