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/config/schema.ts

@@ -0,0 +1,14 @@
+export {
+  paperclipConfigSchema,
+  configMetaSchema,
+  llmConfigSchema,
+  databaseConfigSchema,
+  loggingConfigSchema,
+  serverConfigSchema,
+  type PaperclipConfig,
+  type LlmConfig,
+  type DatabaseConfig,
+  type LoggingConfig,
+  type ServerConfig,
+  type ConfigMeta,
+} from "@paperclip/shared";