Simplify README by removing SDK details

Removed detailed SDK information and examples from the README.

Author: cskonopka

README.md

@@ -1,70 +1,5 @@
-# scheng SDK (v0.1.0) (WIP)
+<p align="center">
+  <img width="35%" height="35%" src="https://raw.githubusercontent.com/schwwaaa/scheng/refs/heads/main/img/logo.png"/>  
+</p>
 
-This workspace is the developer-facing SDK extracted from scheng.
-
-- `scheng-core`: pure data model (configs/events), no OS/GL/IO deps.
-- `scheng-runtime-glow`: OpenGL/glow runtime ("shader machine").
-- `scheng-host-winit`: optional host glue (windowing/policy), kept separate.
-- `examples/minimal`: shows intended SDK usage.
-
-Design rule: **engine takes bytes/handles, returns pixels/errors; host handles files/windows/devices/policy.**
-
-## Engine Contract
-
-See `docs/ENGINE_CONTRACT.md`.
-
-## Runtime invariants (read this if you are building on scheng)
-
-- `docs/RUNTIME_INVARIANTS.md` — the non-negotiable layering rules
-- `docs/PORTS_AND_MIXERS.md` — PortId ordering + mixer semantics
-- `docs/SCENES_AND_BANKS.md` — banks/scenes data model + JSON schema
-
-## Examples
-
-```bash
-cargo run -p scheng-example-minimal
-cargo run -p scheng-example-pure-single-pass
-cargo run -p scheng-example-render-target-only
-```
-
-Graph → Plan → Runtime (C3):
-
-```bash
-cargo run -p scheng-example-graph-minimal
-cargo run -p scheng-example-graph-chain2
-cargo run -p scheng-example-graph-mixer2
-cargo run -p scheng-example-graph-mixer-builtin
-```
-
-Matrix mixer + banks/scenes (C4):
-
-```bash
-cargo run -p scheng-example-graph-matrix-mix4 -- --banks banks.json
-```
-
-```bash
-cargo run -p scheng-example-feedback-pingpong
-```
-
-## OSC (example)
-
-`feedback_pingpong` listens on `127.0.0.1:9000` for `/param/<name> <float>` messages.
-
-Params: `u_speed`, `u_amount`, `u_shift`, `u_mix`.
-
-```bash
-cargo run -p scheng-example-feedback-orb
-```
-
-`feedback_orb` params: `u_decay`, `u_gain`, `u_blur`, `u_add`, `u_smear`, `u_smear_angle`, `u_smear_strength`, `u_mix`, `u_bg`.
-
-Max patches are in `max/`.
-
-
-## Contract Gate (forbidden deps)
-
-Run locally:
-
-```bash
-bash ci/check_forbidden_deps.sh
-```
+<p align="center"><em>Rust-based engine for GPU-accelerated video synthesis and real-time video instrument development.</em></p>