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

operation/file/slim.go

@@ -0,0 +1,31 @@
+package file
+
+import "github.com/mattermost/mattermost-server/v6/model"
+
+func SlimFileInfo(f *model.FileInfo) map[string]interface{} {
+	if f == nil {
+		return nil
+	}
+	return map[string]interface{}{
+		"id":         f.Id,
+		"name":       f.Name,
+		"extension":  f.Extension,
+		"size":       f.Size,
+		"mime_type":  f.MimeType,
+		"channel_id": f.ChannelId,
+		"create_at":  f.CreateAt,
+	}
+}
+
+func SlimFileInfos(infos []*model.FileInfo) []map[string]interface{} {
+	if infos == nil {
+		return nil
+	}
+	result := make([]map[string]interface{}, 0, len(infos))
+	for _, info := range infos {
+		if slim := SlimFileInfo(info); slim != nil {
+			result = append(result, slim)
+		}
+	}
+	return result
+}