Add readme

examples/llava/README.md

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+# LLaVA
+
+Currently this implementation supports [llava-v1.5](https://huggingface.co/liuhaotian/llava-v1.5-7b) variants.
+
+The pre-converted 7b model can be found [here](https://huggingface.co/mys/ggml_llava-v1.5-7b).
+
+After API is confirmed, more models will be supported / uploaded.
+## Usage
+The `llava` target is cmake-only for now (TODO: add to `make`) and built as a part of examples.
+
+After building, run: `./bin/llava` to see the usage. For example:
+
+```sh
+./bin/llava path/to/llava-v1.5-7b/ggml-model-q5_k.gguf path/to/llava-v1.5-7b/mmproj-model-f16.gguf path/to/an/image.jpg
+```
+
+## TODO
+
+These will be include in this pr:
+
+- [ ] Better command line interface.
+- [ ] Document model conversion.
+
+These will be another PR:
+
+- [ ] Support server mode.
+- [ ] Support non-CPU backend for the image encoding part.
+- [ ] Support different sampling methods.
+- [ ] Support more model variants.