Update OpenCode provider info with free models and 75+ providers

- Mention 4 free models: Big Pickle, GLM-4.7, Grok Code Fast 1, MiniMax M2.1
- Note that 75+ providers are available through OpenCode
- Change setup to "opens browser to connect more providers"
- Put opencode-pickle first in variants so test uses a free provider

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <[email protected]>

src/smarttools/cli.py

@@ -364,12 +364,12 @@ PROVIDER_INSTALL_INFO = {
         "variants": ["gemini", "gemini-flash"],
     },
     "opencode": {
-        "group": "OpenCode",
+        "group": "OpenCode (75+ providers)",
         "install_cmd": "curl -fsSL https://opencode.ai/install | bash",
         "requires": "curl, bash",
-        "setup": "Run 'opencode' - opens browser for sign-in",
-        "cost": "Free tier available, paid for premium models",
-        "variants": ["opencode-deepseek", "opencode-pickle", "opencode-nano", "opencode-reasoner", "opencode-grok"],
+        "setup": "Run 'opencode' - opens browser to connect more providers",
+        "cost": "4 FREE models included (Big Pickle, GLM-4.7, Grok Code Fast 1, MiniMax M2.1), 75+ more available",
+        "variants": ["opencode-pickle", "opencode-deepseek", "opencode-nano", "opencode-reasoner", "opencode-grok"],
     },
     "ollama": {
         "group": "Ollama (Local LLMs)",