Add MCPLoadTester plugin descriptor for Plugins Manager (#782)

* Add MCPulse plugin descriptor for Plugins Manager

* Update MCPulse plugin description for transport support

* Move descriptor to various.json and rename to MCPLoadTester

Author: AndreyVMarkelov

site/dat/repo/various.json

@@ -2829,6 +2829,30 @@
       "depends": ["jmeter-core", "jmeter-components"]
     }
   }
+},
+{
+  "id": "avm-mcp-sampler",
+  "name": "MCPLoadTester MCP Sampler",
+  "description": "MCP sampler for stdio, HTTP, and HTTP+SSE transports",
+  "screenshotUrl": "https://raw.githubusercontent.com/AndreyVMarkelov/MCPulse/main/docs/images/stdio_sampler_settings.png",
+  "helpUrl": "https://github.com/AndreyVMarkelov/MCPulse",
+  "vendor": "Andrey Markelov",
+  "markerClass": "io.github.mcpsampler.gui.McpSamplerGui",
+  "componentClasses": [
+    "io.github.mcpsampler.McpSampler",
+    "io.github.mcpsampler.gui.McpSamplerGui"
+  ],
+  "versions": {
+    "1.0.1": {
+      "downloadUrl": "https://github.com/AndreyVMarkelov/MCPulse/releases/download/v1.0.1/jmeter-mcp-sampler-1.0.1.jar",
+      "changes": "Release v1.0.1",
+      "libs": {
+        "jackson-databind": "https://repo1.maven.org/maven2/com/fasterxml/jackson/core/jackson-databind/2.17.1/jackson-databind-2.17.1.jar",
+        "jackson-core": "https://repo1.maven.org/maven2/com/fasterxml/jackson/core/jackson-core/2.17.1/jackson-core-2.17.1.jar",
+        "jackson-annotations": "https://repo1.maven.org/maven2/com/fasterxml/jackson/core/jackson-annotations/2.17.1/jackson-annotations-2.17.1.jar"
+      }
+    }
+  }
 }
 
 ]