[TRTLLM-9092][doc] Add a pre-quantized example in quick start guide

[QiJune]

Summary by CodeRabbit

• Documentation
  • Enhanced quick-start guide with instructions for deploying pre-quantized models using FP8 precision. Includes sample deployment commands and important precautions regarding FP8 support to assist users with proper model deployment procedures.

Description

Test Coverage

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• PR Follows TRT-LLM CODING GUIDELINES to the best of your knowledge.

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[coderabbitai]

📝 Walkthrough

Walkthrough

Documentation updated to include deployment guidance for pre-quantized FP8 models, featuring sample commands and FP8 support precautions. No functional or runtime behavior changes.

Changes

Cohort / File(s)	Summary
Quick-start deployment documentation docs/source/quick-start-guide.md	Added instructions for deploying pre-quantized models with FP8 quantization, including example deployment command and important caveats regarding FP8 support compatibility.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

• Verify accuracy of the FP8 deployment command syntax and parameters
• Confirm FP8 support precautions are technically correct and complete
• Ensure consistency with existing documentation tone and formatting

Pre-merge checks and finishing touches

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The PR description is missing critical required sections. Only the template boilerplate is present with empty Description and Test Coverage sections, and an unchecked PR Checklist.	Complete the Description section explaining what changes are being made and why. Specify relevant test coverage. Fill in the PR title with proper format: [TICKET][type] Summary. Complete the PR Checklist verification.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title correctly follows the repository template with [JIRA ticket][type] format and clearly describes the main change: adding a pre-quantized example to the quick start guide documentation.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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[QiJune]

/bot skip --comment "doc changes"

[tensorrt-cicd]

PR_Github #24955 [ skip ] triggered by Bot. Commit: 71925a7

[tensorrt-cicd]

PR_Github #24955 [ skip ] completed with state SUCCESS. Commit: 71925a7
Skipping testing for commit 71925a7