[Docs] Add optimum-cli export command with quantization for Whisper use case page (openvinotoolkit#3105)

## Description
This PR updates the speech recognition (Whisper) use case page to
demonstrate both default and INT8 quantized optimum-cli export options.

Preview:
https://yatarkan.github.io/openvino.genai/docs/use-cases/speech-recognition/

## Checklist:
- [x] Tests have been updated or added to cover the new code - **N/A**
- [x] This patch fully addresses the ticket
- [x] I have made corresponding changes to the documentation

Author: yatarkan

site/docs/use-cases/speech-recognition/index.mdx

@@ -11,7 +11,14 @@ import UsageOptionsSection from './_sections/_usage_options/index.mdx';
 <ConvertModelSection>
     Download and convert model (e.g. [openai/whisper-base](https://huggingface.co/openai/whisper-base)) to OpenVINO format from Hugging Face:
 
-    <OptimumCLI model='openai/whisper-base' outputDir='whisper_ov' trustRemoteCode />
+    <Tabs groupId="whisper-export-command">
+        <TabItem label="Default" value="default">
+            <OptimumCLI model='openai/whisper-base' outputDir='whisper_ov' trustRemoteCode />
+        </TabItem>
+        <TabItem label="INT8 Static Quantization" value="int8_quant">
+            <OptimumCLI model='openai/whisper-base' outputDir='whisper_ov_int8' trustRemoteCode quantMode='int8' dataset='librispeech' numSamples={32} />
+        </TabItem>
+    </Tabs>
 
     See all supported [Speech Recognition Models](/docs/supported-models/#speech-recognition-models-whisper-based).
 </ConvertModelSection>

site/src/components/OptimumCLI/index.tsx

@@ -7,6 +7,9 @@ type OptimumCLIProps = {
   task?: string;
   trustRemoteCode?: boolean;
   modelKwargs?: Record<string, string>;
+  quantMode?: 'int8';
+  dataset?: string;
+  numSamples?: number;
 };
 
 export default function OptimumCLI({
@@ -16,6 +19,9 @@ export default function OptimumCLI({
   task,
   trustRemoteCode,
   modelKwargs,
+  quantMode,
+  dataset,
+  numSamples,
 }: OptimumCLIProps): React.JSX.Element {
   const args = [`--model ${model}`];
   if (weightFormat) {
@@ -24,6 +30,15 @@ export default function OptimumCLI({
   if (task) {
     args.push(`--task ${task}`);
   }
+  if (quantMode) {
+    args.push(`--quant-mode ${quantMode}`);
+  }
+  if (dataset) {
+    args.push(`--dataset ${dataset}`);
+  }
+  if (numSamples) {
+    args.push(`--num-samples ${numSamples}`);
+  }
   if (trustRemoteCode) {
     args.push('--trust-remote-code');
   }