Add initial implementations for encoder handling and conversion logic

Introduce encoder modules for various codecs and formats (e.g., h264_nvenc, libx264, libmp3lame). Add `Convertor` logic to retrieve supported formats via FFmpeg utilities and manage encoders for audio, video, and image processing.

internal/application/convertor/convertor.go

@@ -0,0 +1,54 @@
+package convertor
+
+import (
+	"bufio"
+	"git.kor-elf.net/kor-elf/gui-for-ffmpeg/internal/application/convertor/encoder"
+	"git.kor-elf.net/kor-elf/gui-for-ffmpeg/internal/ffmpeg"
+	"io"
+	"strings"
+)
+
+type ConvertorContract interface {
+	GetSupportFormats() (encoder.ConvertorFormatsContract, error)
+}
+
+type convertor struct {
+	ffmpegService ffmpeg.UtilitiesContract
+}
+
+func NewConvertor(
+	ffmpegService ffmpeg.UtilitiesContract,
+) ConvertorContract {
+	return &convertor{
+		ffmpegService: ffmpegService,
+	}
+}
+
+func (c *convertor) GetSupportFormats() (encoder.ConvertorFormatsContract, error) {
+	var err error
+
+	formats := encoder.NewConvertorFormats()
+	ffmpeg, err := c.ffmpegService.GetFFmpeg()
+	if err != nil {
+		return formats, err
+	}
+	err = ffmpeg.GetEncoders(func(scanner *bufio.Reader) {
+		for {
+			line, _, err := scanner.ReadLine()
+			if err != nil {
+				if err == io.EOF {
+					break
+				}
+				continue
+			}
+			text := strings.Split(strings.TrimSpace(string(line)), " ")
+			encoderType := string(text[0][0])
+			if len(text) < 2 || (encoderType != "V" && encoderType != "A") {
+				continue
+			}
+			formats.NewEncoder(text[1])
+		}
+	})
+
+	return formats, err
+}