fix: Address review findings in Qwen converter

- Fix P1: Remove dead TOOL_MAP constant (defined but never referenced)
- Fix P1: Replace curl fallback for remote MCP servers with warn-and-skip,
  matching the kiro pattern — curl is not an MCP server
- Fix P1: Remove incorrect literal cwd field ("${extensionPath}${/}") from
  stdio MCP server config; the value was never interpolated
- Fix P1: Fix plugin.name → plugin.manifest.name in generateContextFile
  (plugin.name does not exist on ClaudePlugin; produced "# undefined")
- Fix P1: Wire qwenHome through resolveTargetOutputRoot; previously the
  --qwen-home CLI flag was parsed but silently discarded
- Fix P1: Remove hardcoded "compound-engineering" from qwen output path;
  now uses plugin.manifest.name via new qwenHome + pluginName params
- Fix P1: Collapse dead-code resolveQwenPaths branches (both returned
  identical structures; simplify to a single return)
- Fix P3: Remove rewriting of .opencode/ paths to .qwen/ — Claude plugins
  do not reference opencode paths, and rewriting them is incorrect
- Fix P3: inferTemperature now returns undefined for unrecognized agents
  instead of 0.3 (matching the explicit doc branch), letting the model
  use its default temperature
- Fix P2: Add lookbehind guards to rewriteQwenPaths() matching kiro pattern
  to avoid rewriting paths inside compound tokens or URLs
- Update --qwen-home default to ~/.qwen/extensions (plugin name appended)
- Add qwen-converter.test.ts with 16 tests covering all scenarios

Co-Authored-By: Claude <noreply@anthropic.com>

src/targets/qwen.ts

@@ -53,23 +53,6 @@ export async function writeQwenBundle(outputRoot: string, bundle: QwenBundle): P
 }
 
 function resolveQwenPaths(outputRoot: string) {
-  const base = path.basename(outputRoot)
-  // Global install: ~/.qwen/extensions/<extension-name>
-  // Project install: .qwen/extensions/<extension-name> or <extension-name> at root
-  // If the output root already ends with "extensions" or contains ".qwen/extensions", write directly
-  if (base === "extensions" || outputRoot.includes(".qwen/extensions")) {
-    return {
-      root: outputRoot,
-      configPath: path.join(outputRoot, "qwen-extension.json"),
-      contextPath: path.join(outputRoot, "QWEN.md"),
-      agentsDir: path.join(outputRoot, "agents"),
-      commandsDir: path.join(outputRoot, "commands"),
-      skillsDir: path.join(outputRoot, "skills"),
-    }
-  }
-
-  // Custom output directory - write directly to the output root (not nested)
-  // This is for project-level installs like ./my-extension
   return {
     root: outputRoot,
     configPath: path.join(outputRoot, "qwen-extension.json"),