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/commands/onboard.ts

@@ -0,0 +1,127 @@
+import * as p from "@clack/prompts";
+import pc from "picocolors";
+import { configExists, readConfig, writeConfig } from "../config/store.js";
+import type { PaperclipConfig } from "../config/schema.js";
+import { promptDatabase } from "../prompts/database.js";
+import { promptLlm } from "../prompts/llm.js";
+import { promptLogging } from "../prompts/logging.js";
+import { promptServer } from "../prompts/server.js";
+
+export async function onboard(opts: { config?: string }): Promise<void> {
+  p.intro(pc.bgCyan(pc.black(" paperclip onboard ")));
+
+  // Check for existing config
+  if (configExists(opts.config)) {
+    const existing = readConfig(opts.config);
+    if (existing) {
+      const overwrite = await p.confirm({
+        message: "A config file already exists. Overwrite it?",
+        initialValue: false,
+      });
+
+      if (p.isCancel(overwrite) || !overwrite) {
+        p.cancel("Keeping existing configuration.");
+        return;
+      }
+    }
+  }
+
+  // Database
+  p.log.step(pc.bold("Database"));
+  const database = await promptDatabase();
+
+  if (database.mode === "postgres" && database.connectionString) {
+    const s = p.spinner();
+    s.start("Testing database connection...");
+    try {
+      const { createDb } = await import("@paperclip/db");
+      const db = createDb(database.connectionString);
+      await db.execute("SELECT 1");
+      s.stop("Database connection successful");
+    } catch (err) {
+      s.stop(pc.yellow("Could not connect to database — you can fix this later with `paperclip doctor`"));
+    }
+  }
+
+  // LLM
+  p.log.step(pc.bold("LLM Provider"));
+  const llm = await promptLlm();
+
+  if (llm?.apiKey) {
+    const s = p.spinner();
+    s.start("Validating API key...");
+    try {
+      if (llm.provider === "claude") {
+        const res = await fetch("https://api.anthropic.com/v1/messages", {
+          method: "POST",
+          headers: {
+            "x-api-key": llm.apiKey,
+            "anthropic-version": "2023-06-01",
+            "content-type": "application/json",
+          },
+          body: JSON.stringify({
+            model: "claude-sonnet-4-5-20250929",
+            max_tokens: 1,
+            messages: [{ role: "user", content: "hi" }],
+          }),
+        });
+        if (res.ok || res.status === 400) {
+          s.stop("API key is valid");
+        } else if (res.status === 401) {
+          s.stop(pc.yellow("API key appears invalid — you can update it later"));
+        } else {
+          s.stop(pc.yellow("Could not validate API key — continuing anyway"));
+        }
+      } else {
+        const res = await fetch("https://api.openai.com/v1/models", {
+          headers: { Authorization: `Bearer ${llm.apiKey}` },
+        });
+        if (res.ok) {
+          s.stop("API key is valid");
+        } else if (res.status === 401) {
+          s.stop(pc.yellow("API key appears invalid — you can update it later"));
+        } else {
+          s.stop(pc.yellow("Could not validate API key — continuing anyway"));
+        }
+      }
+    } catch {
+      s.stop(pc.yellow("Could not reach API — continuing anyway"));
+    }
+  }
+
+  // Logging
+  p.log.step(pc.bold("Logging"));
+  const logging = await promptLogging();
+
+  // Server
+  p.log.step(pc.bold("Server"));
+  const server = await promptServer();
+
+  // Assemble and write config
+  const config: PaperclipConfig = {
+    $meta: {
+      version: 1,
+      updatedAt: new Date().toISOString(),
+      source: "onboard",
+    },
+    ...(llm && { llm }),
+    database,
+    logging,
+    server,
+  };
+
+  writeConfig(config, opts.config);
+
+  p.note(
+    [
+      `Database: ${database.mode}`,
+      llm ? `LLM: ${llm.provider}` : "LLM: not configured",
+      `Logging: ${logging.mode} → ${logging.logDir}`,
+      `Server: port ${server.port}`,
+    ].join("\n"),
+    "Configuration saved",
+  );
+
+  p.log.info(`Run ${pc.cyan("pnpm paperclip doctor")} to verify your setup.`);
+  p.outro("You're all set!");
+}