dev-api: add developer portal, OpenAPI spec, and Flatenbadet case study

- New /developers/ page with API docs, SDKs, pricing, use cases
- OpenAPI 3.0 spec for Orders, Missions, Photos, Analytics
- Case study: Glasskiosken i Flatenbadet — complete ROI analysis
- Updated /order/ with recurring missions and frequency dropdown

services/frilans-payout/node_modules/pg-protocol/dist/buffer-writer.d.ts

@@ -0,0 +1,17 @@
+export declare class Writer {
+    private size;
+    private buffer;
+    private offset;
+    private headerPosition;
+    constructor(size?: number);
+    private ensure;
+    addInt32(num: number): Writer;
+    addInt16(num: number): Writer;
+    addCString(string: string): Writer;
+    addString(string?: string): Writer;
+    addInt32PrefixedString(string: string): Writer;
+    add(otherBuffer: Buffer): Writer;
+    private join;
+    flush(code?: number): Buffer;
+    clear(): void;
+}