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/log-check.ts

@@ -0,0 +1,37 @@
+import fs from "node:fs";
+import path from "node:path";
+import type { PaperclipConfig } from "../config/schema.js";
+import type { CheckResult } from "./index.js";
+
+export function logCheck(config: PaperclipConfig): CheckResult {
+  const logDir = path.resolve(config.logging.logDir);
+
+  if (!fs.existsSync(logDir)) {
+    return {
+      name: "Log directory",
+      status: "warn",
+      message: `Log directory does not exist: ${logDir}`,
+      canRepair: true,
+      repair: () => {
+        fs.mkdirSync(logDir, { recursive: true });
+      },
+    };
+  }
+
+  try {
+    fs.accessSync(logDir, fs.constants.W_OK);
+    return {
+      name: "Log directory",
+      status: "pass",
+      message: `Log directory is writable: ${logDir}`,
+    };
+  } catch {
+    return {
+      name: "Log directory",
+      status: "fail",
+      message: `Log directory is not writable: ${logDir}`,
+      canRepair: false,
+      repairHint: "Check file permissions on the log directory",
+    };
+  }
+}