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;
+  }
+}