Release Note for 1.8.0 (#3765)

Release note for 1.8.0 is added

ONE-DCO-1.0-Signed-off-by: seongwoo <[email protected]>

docs/release/1.8/release-note-1.8.0.md

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+# Release Note 1.8.0
+
+## Feature Highlights
+
+- **ONE** Compiler
+    - Support new command line interface
+
+- **ONE** Runtime
+    - CPU backend supports 7 more operations
+    - CPU backend supports 9 more quant8 operations
+
+## ONE Compiler
+
+### New command line interface for user interface consistancy
+
+- `one-import-bcq` : import BCQ(Binary coding quantized) TensorFlow model
+- Commands now support `--version` option to show version number
+
+### Changes
+
+- Experimental support for TensorFlow 2.x has updated to 2.3.0 (TensorFlow 1.3.2 is our official support version)
+- Support more operators in luci-interpreter
+- Enhancing one-quantizer
+
+## ONE Runtime
+
+### Rename headers
+
+- Rename `nnfw_dev.h` to `nnfw_experimental.h`
+
+### Optimization
+
+- Remove copies for model input/outputs whenever possible
+
+### Support CPU backend operation
+
+- BatchToSpaceND, L2Normalization, ReLU6, ResizeBilinear, SpaceToDepth, SplitV, StatelessRandomUniform
+
+### Support CPU backend quant8 operation
+
+- BatchToSpaceND, L2Normalization, Pad, PadV2, ResizeBilinear, Slice, Quantize, SpaceToDepth, Sum
+