feat: implement mcpctl install command with LLM-assisted auto-config

Add install command for setting up MCP servers with:
- Server lookup by name/package from registry search results
- LLM-assisted README analysis for missing envTemplate (Ollama)
- Interactive credential prompting with password masking
- Non-interactive mode using env vars for CI/CD
- Dry-run mode, custom profile names, project association
- Zod validation of LLM responses, README sanitization
- DI for full testability, 38 tests

128 tests passing total.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.taskmaster/tasks/tasks.json

@@ -750,9 +750,9 @@
         "dependencies": [
           "25"
         ],
-        "status": "in-progress",
+        "status": "done",
         "subtasks": [],
-        "updatedAt": "2026-02-21T03:55:53.004Z"
+        "updatedAt": "2026-02-21T03:57:21.119Z"
       },
       {
         "id": "27",
@@ -765,15 +765,16 @@
           "25",
           "26"
         ],
-        "status": "pending",
-        "subtasks": []
+        "status": "in-progress",
+        "subtasks": [],
+        "updatedAt": "2026-02-21T03:57:56.152Z"
       }
     ],
     "metadata": {
       "version": "1.0.0",
-      "lastModified": "2026-02-21T03:55:53.004Z",
+      "lastModified": "2026-02-21T03:57:56.152Z",
       "taskCount": 27,
-      "completedCount": 2,
+      "completedCount": 3,
       "tags": [
         "master"
       ]