Go: add new provider minimax (#14296)

### What problem does this PR solve?

1. Add new provider minimax
2. Add new command: CHECK INSTANCE 'instance_name' FROM 'provider_name';
```
RAGFlow(user)> check instance 'test' from 'minimax';
SUCCESS
```

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

Signed-off-by: Jin Hai <haijin.chn@gmail.com>

internal/cli/parser.go

@@ -196,6 +196,8 @@ func (p *Parser) parseUserCommand() (*Command, error) {
 		return p.parseChatCommand()
 	case TokenThink:
 		return p.parseThinkCommand()
+	case TokenCheck:
+		return p.parseCheckCommand()
 	case TokenLS:
 		return p.parseContextListCommand()
 	case TokenCat: