Add smoll README

Author: staghado

extensions/vitstr.cpp/README.md

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+# ViTSTR: Vision Transformer for Fast and Efficient Scene Text Recognition
+[Code](https://github.com/roatienza/deep-text-recognition-benchmark)
+
+
+## Build
+
+    mkdir -p build && cd build
+    cmake ..
+    make -j4
+
+
+## Usage
+
+
+<p align="center">
+<img src="images/demo_1.png" alt="example input" width="50%" height="auto">
+</p>
+
+<pre>
+./bin/vitstr -t 4 -m ../ggml-model-f16.gguf -i ../images/demo_1.png 
+main: seed = 1706997535
+main: n_threads = 4 / 8
+vit_model_load: loading model from '../ggml-model-f16.gguf' - please wait
+vit_model_load: hidden_size            = 768
+vit_model_load: num_hidden_layers      = 12
+vit_model_load: num_attention_heads    = 12
+vit_model_load: patch_size             = 16
+vit_model_load: img_size               = 224
+vit_model_load: num_classes            = 96
+vit_model_load: ftype                  = 1
+vit_model_load: qntvr                  = 0
+operator(): ggml ctx size = 164.48 MB
+vit_model_load: ................... done
+vit_model_load: model size =   163.56 MB / num tensors = 152
+main: loaded image '../images/demo_1.png' (184 x 72)
+processed, out dims : (224 x 224)
+------------------ 
+Available
+score : 1.00 
+------------------ 
+
+
+main:    model load time =   144.64 ms
+main:    processing time =  1176.77 ms
+main:    total time      =  1321.41 ms