[Docs] ggml: add README for the embedding example with CI job (second-state#114)

Signed-off-by: dm4 <dm4@secondstate.io>

Author: dm4

.github/workflows/llama.yml

@@ -132,6 +132,18 @@ jobs:
                 target/wasm32-wasi/release/wasmedge-ggml-multimodel.wasm \
                 'describe this picture please'
 
+          - name: Embedding Example
+            run: |
+              test -f ~/.wasmedge/env && source ~/.wasmedge/env
+              cd wasmedge-ggml/embedding
+              curl -LO https://huggingface.co/second-state/All-MiniLM-L6-v2-Embedding-GGUF/resolve/main/all-MiniLM-L6-v2-ggml-model-f16.gguf
+              cargo build --target wasm32-wasi --release
+              time wasmedge --dir .:. \
+                --nn-preload default:GGML:AUTO:all-MiniLM-L6-v2-ggml-model-f16.gguf \
+                target/wasm32-wasi/release/wasmedge-ggml-llama-embedding.wasm \
+                default \
+                'hello world'
+
           - name: Build llama-stream
             run: |
               cd wasmedge-ggml/llama-stream
@@ -142,11 +154,6 @@ jobs:
               cd wasmedge-ggml/chatml
               cargo build --target wasm32-wasi --release
 
-          - name: Build embedding
-            run: |
-              cd wasmedge-ggml/embedding
-              cargo build --target wasm32-wasi --release
-
           - name: Build llava-base64-stream
             run: |
               cd wasmedge-ggml/llava-base64-stream

wasmedge-ggml/embedding/README.md

@@ -0,0 +1,41 @@
+# Embedding Example For WASI-NN with GGML Backend
+
+> [!NOTE]
+> Please refer to the [wasmedge-ggml/README.md](../README.md) for the general introduction and the setup of the WASI-NN plugin with GGML backend. This document will focus on the specific example of generating embeddings.
+
+## Get the Model
+
+In this example, we are going to use the pre-converted `all-MiniLM-L6-v2` model.
+
+Download the model:
+
+```bash
+curl -LO https://huggingface.co/second-state/All-MiniLM-L6-v2-Embedding-GGUF/resolve/main/all-MiniLM-L6-v2-ggml-model-f16.gguf
+```
+
+## Parameters
+
+> [!NOTE]
+> Please check the parameters section of [wasmedge-ggml/README.md](https://github.com/second-state/WasmEdge-WASINN-examples/tree/master/wasmedge-ggml#parameters) first.
+
+## Execute
+
+Execute the WASM with the `wasmedge` using the named model feature to preload a large model:
+
+```console
+$ wasmedge --dir .:. \
+  --nn-preload default:GGML:AUTO:all-MiniLM-L6-v2-ggml-model-f16.gguf \
+  wasmedge-ggml-llama-embedding.wasm default
+
+Prompt:
+What's the capital of the United States?
+Raw Embedding Output: {"n_embedding": 384, "embedding": [0.5426152349,-0.03840282559,-0.03644151986,0.3677068651,-0.115977712...(omitted)...,-0.003531290218]}
+Interact with Embedding:
+N_Embd: 384
+Show the first 5 elements:
+embd[0] = 0.5426152349
+embd[1] = -0.03840282559
+embd[2] = -0.03644151986
+embd[3] = 0.3677068651
+embd[4] = -0.115977712
+```