add file browser component and widget

examples/file_browser_demo/mock-server/mock_files/why.md

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+# Rethinking Backend Ownership
+
+## Motivation
+
+Modern applications are powered by backends that run on infrastructure and systems controlled by centralized entities. Whether it's social platforms, collaboration tools, or data-driven apps, the backend is almost always a black box — hosted, maintained, and operated by someone else.
+
+This has profound implications:
+
+- **Loss of autonomy:** Users are locked out of the logic, rules, and data structures that govern their digital experience.
+- **Opaque control:** Application behavior can change without the user’s consent — and often without visibility.
+- **Vendor lock-in:** Switching providers or migrating data is often non-trivial, risky, or impossible.
+- **Security and privacy risks:** Centralized backends present single points of failure and attack.
+
+In this model, users are not participants in their computing environment — they are clients of someone else's backend.
+
+## The Vision
+
+The purpose of this initiative is to invert that dynamic. We aim to establish a paradigm where users and organizations **own and control their own backend logic and data**, without sacrificing connectivity, collaboration, or scalability.
+
+This means:
+
+- **Local authority:** Each user or organization should have full control over how their backend behaves — what code runs, what data is stored, and who can access it.
+- **Portable and interoperable:** Ownership must not mean isolation. User-owned backends should be able to interact with one another on equal footing.
+- **Transparent logic:** Application behavior should be visible, inspectable, and modifiable by the user.
+- **Delegation, not dependence:** Users should be able to cooperate and interact by delegating execution to each other — not by relying on a central server.
+
+## What We Stand For
+
+- **Agency:** You control your digital environment.
+- **Decentralization:** No central chokepoint for computation or data.
+- **Modularity:** Users compose their backend behavior, not inherit it from a monolith.
+- **Resilience:** Systems should degrade gracefully, fail independently, and recover without central orchestration.
+
+This is about building a more equitable and open computing model — one where the backend serves you, not the other way around.