feat: add server version

operation/version/version.go

@@ -0,0 +1,28 @@
+package version
+
+import (
+	"context"
+	"fmt"
+
+	"gitea.com/gitea/gitea-mcp/pkg/flag"
+	"github.com/mark3labs/mcp-go/mcp"
+)
+
+const (
+	GetGiteaMCPServerVersion = "get_gitea_mcp_server_version"
+)
+
+var (
+	GetGiteaMCPServerVersionTool = mcp.NewTool(
+		GetGiteaMCPServerVersion,
+		mcp.WithDescription("Get Gitea MCP Server Version"),
+	)
+)
+
+func GetGiteaMCPServerVersionFn(ctx context.Context, request mcp.CallToolRequest) (*mcp.CallToolResult, error) {
+	version := flag.Version
+	if version == "" {
+		version = "dev"
+	}
+	return mcp.NewToolResultText(fmt.Sprintf("Gitea MCP Server version: %v", version)), nil
+}