Setup fetch and wip fetchall route for getting companies.

src/managers/companies.ts

@@ -0,0 +1,20 @@
+import { prisma } from "../constants";
+import { CompanyController } from "../controllers/CompanyController";
+
+export const companies = {
+  async fetch(identifier: string | number): Promise<CompanyController> {
+    const search = await prisma.company.findFirst({
+      where: {
+        OR: [
+          { id: identifier as string },
+          { cw_CompanyId: identifier as number },
+          { cw_Identifier: identifier as string },
+        ],
+      },
+    });
+
+    if (!search) throw new Error("Unknown company.");
+
+    return new CompanyController(search);
+  },
+};