feat: format message from telegram and upload attachments (#1924)

* feat: format message from telegram and download documents

* fix: remove bool in expression

* refactor: convert to markdown

* refactor: resolve remarks and add support new message types

* refactor: resolve remarks

* feat: add test for mime type

---------

Co-authored-by: Александр Тумайкин <AATumaykin@tsum.ru>

plugin/telegram/attachment_test.go

@@ -0,0 +1,83 @@
+package telegram
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestGetMimeType(t *testing.T) {
+	tests := []struct {
+		mimeType string
+		fileName string
+		expected string
+	}{
+		{
+			fileName: "file.jpg",
+			mimeType: "image/jpeg",
+			expected: "image/jpeg",
+		},
+		{
+			fileName: "file.png",
+			mimeType: "image/png",
+			expected: "image/png",
+		},
+		{
+			fileName: "file.pdf",
+			mimeType: "application/pdf",
+			expected: "application/pdf",
+		},
+		{
+			fileName: "file.php",
+			mimeType: "application/x-php",
+			expected: "application/x-php",
+		},
+		{
+			fileName: "file.xlsx",
+			mimeType: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
+			expected: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
+		},
+		{
+			fileName: "file.oga",
+			mimeType: "audio/ogg",
+			expected: "audio/ogg",
+		},
+		{
+			fileName: "file.jpg",
+			expected: "image/jpeg",
+		},
+		{
+			fileName: "file.png",
+			expected: "image/png",
+		},
+		{
+			fileName: "file.mp4",
+			expected: "video/mp4",
+		},
+		{
+			fileName: "file.pdf",
+			expected: "application/octet-stream",
+		},
+		{
+			fileName: "file.oga",
+			expected: "audio/ogg",
+		},
+		{
+			fileName: "file.xlsx",
+			expected: "application/octet-stream",
+		},
+		{
+			fileName: "file.txt",
+			expected: "application/octet-stream",
+		},
+	}
+
+	for _, test := range tests {
+		attachment := Attachment{
+			FileName: test.fileName,
+			MimeType: test.mimeType,
+		}
+
+		require.Equal(t, test.expected, attachment.GetMimeType())
+	}
+}