Add TT-NN roadmap and overview (#15253)

### Ticket
None

### Problem description
Being more transparent, sharing the current state of planning/ outlook
at TT-NN

### What's changed
Adding roadmap and some description to ttnn.md

tech_reports/ttnn/ttnn.md

@@ -1 +1,35 @@
+# TT-NN
 
+Table of Contents
+=================
+- [Roadmap](#roadmap)
+- [High Level Structure Overview](#high-level-structure-overview)
+- [ML Framework](#ml-framework)
+- [Library of Accelerated Operations](#op-library)
+- [OP Infra](#op-infra)
+  - [Tensor](https://docs.tenstorrent.com/ttnn/latest/ttnn/tensor.html)
+  - [Operation](https://docs.tenstorrent.com/ttnn/latest/ttnn/adding_new_ttnn_operation.html)
+- [Runtime](#tt-nn-runtime)
+  - [Graph Tracing](https://github.com/tenstorrent/tt-metal/blob/main/tech_reports/ttnn/graph-tracing.md)
+- [Profiler](https://docs.tenstorrent.com/ttnn/latest/ttnn/profiling_ttnn_operations.html)
+
+
+## Roadmap
+![TT-NN Roadmap v01](https://github.com/user-attachments/assets/a091f4d6-77a3-445d-81b5-946de181bfd9)
+
+## High Level Structure Overview
+![TT-NN High Level](https://github.com/user-attachments/assets/15d37bea-ac60-45e2-ac76-02d840253555)
+
+## ML Framework
+![TT-NN ML Framework](https://github.com/user-attachments/assets/aeb104df-4426-49f1-a3c8-8c070f32bdfe)
+
+## OP Library
+![TT-NN OP Library](https://github.com/user-attachments/assets/acc5645b-d90a-4793-ae54-9ad825504fed)
+
+## OP Infra
+OP Infra is the foundation for the OP Libary that provides common primitives required by all operations
+  - [Tensor](https://docs.tenstorrent.com/ttnn/latest/ttnn/tensor.html)
+  - [Operation](https://docs.tenstorrent.com/ttnn/latest/ttnn/adding_new_ttnn_operation.html)
+
+## TT-NN Runtime
+![TT-NN Runtime](https://github.com/user-attachments/assets/0794b7c2-82b6-49aa-9117-9aee8b1c1ecd)