Add LLM Metrics Visualizer plugin

[bakthava]

LLM Metrics Visualizer

A JMeter listener plugin for monitoring LLM (Large Language Model) performance metrics in real time.

Features

• TTFT (Time to First Token)
• TPOT (Time per Output Token)
• RPS (Requests per Second)
• Input/Output tokens per request and per minute
• Response time percentiles (Min, Avg, Max, 90th)
• Grouped by sampler name

Links

• GitHub: https://github.com/bakthava/LLM-Metrics-Visualizer
• Release JAR: https://github.com/bakthava/LLM-Metrics-Visualizer/releases/download/v0.1/LLM_Metrics_Visualizer-0.1.jar

Java 8 compatible (bytecode version 52).

[Copilot]

Pull request overview

Adds the LLM Metrics Visualizer JMeter listener plugin to the plugin repository index so it can be discovered/installed via the repository metadata.

Changes:

• Added a new plugin entry (llm-metrics-visualizer) with description, vendor, URLs, and class metadata
• Registered initial version 0.1 with its GitHub release JAR download URL and dependency on jmeter-core

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