community[minor]: Add QuantizedEmbedders (#17391)

**Description:** 
* adding Quantized embedders using optimum-intel and
intel-extension-for-pytorch.
* added mdx documentation and example notebooks 
* added embedding import testing.

**Dependencies:** 
optimum = {extras = ["neural-compressor"], version = "^1.14.0", optional
= true}
intel_extension_for_pytorch = {version = "^2.2.0", optional = true}

Dependencies have been added to pyproject.toml for the community lib.  

**Twitter handle:** @peter_izsak

---------

Co-authored-by: Bagatur <baskaryan@gmail.com>

libs/community/tests/unit_tests/embeddings/test_imports.py

@@ -58,6 +58,7 @@ EXPECTED_ALL = [
     "BookendEmbeddings",
     "VolcanoEmbeddings",
     "OCIGenAIEmbeddings",
+    "QuantizedBiEncoderEmbeddings",
     "NeMoEmbeddings",
 ]