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>

cli/src/checks/index.ts

@@ -0,0 +1,14 @@
+export interface CheckResult {
+  name: string;
+  status: "pass" | "warn" | "fail";
+  message: string;
+  canRepair?: boolean;
+  repair?: () => void | Promise<void>;
+  repairHint?: string;
+}
+
+export { configCheck } from "./config-check.js";
+export { databaseCheck } from "./database-check.js";
+export { llmCheck } from "./llm-check.js";
+export { logCheck } from "./log-check.js";
+export { portCheck } from "./port-check.js";