feat: Add OpenCode configuration for local Ollama

Add OpenCode.ai configuration to use local Ollama instance with
Qwen2.5-Coder 7B model for AI-assisted coding tasks.

opencode.json

@@ -0,0 +1,18 @@
+{
+  "$schema": "https://opencode.ai/config.json",
+  "provider": {
+    "ollama": {
+      "npm": "@ai-sdk/openai-compatible",
+      "name": "Ollama (Local)",
+      "options": {
+        "baseURL": "http://localhost:11434/v1"
+      },
+      "models": {
+        "qwen2.5-coder:7b": {
+          "name": "Qwen2.5-Coder 7B (Coding)",
+          "context_length": 32768
+        }
+      }
+    }
+  }
+}