feat: initial release with 48 Mattermost MCP tools

- 27 base tools: channels, messaging, users, reactions, files, DMs
- Team management: invite/remove users, get stats, list members
- Slash commands: execute /remind, /poll, etc.
- Webhook management: incoming and outgoing webhooks
- System tools: server config, logs, bulk status updates
- Channel admin: create, invite, leave, delete channels
- Read-only mode for safe exploration
- Dual token support (bot + PAT) for enhanced security
- Apache 2.0 licensed

pkg/to/to.go

@@ -0,0 +1,46 @@
+package to
+
+import (
+	"encoding/json"
+	"fmt"
+
+	"github.com/mark3labs/mcp-go/mcp"
+)
+
+func Result(data interface{}) *mcp.CallToolResult {
+	content, err := json.MarshalIndent(data, "", "  ")
+	if err != nil {
+		return Error(fmt.Errorf("failed to marshal result: %w", err))
+	}
+	return &mcp.CallToolResult{
+		Content: []mcp.Content{
+			mcp.TextContent{
+				Type: "text",
+				Text: string(content),
+			},
+		},
+	}
+}
+
+func Text(text string) *mcp.CallToolResult {
+	return &mcp.CallToolResult{
+		Content: []mcp.Content{
+			mcp.TextContent{
+				Type: "text",
+				Text: text,
+			},
+		},
+	}
+}
+
+func Error(err error) *mcp.CallToolResult {
+	return &mcp.CallToolResult{
+		Content: []mcp.Content{
+			mcp.TextContent{
+				Type: "text",
+				Text: err.Error(),
+			},
+		},
+		IsError: true,
+	}
+}