Add missing Track, Album, Artist model types and client methods

Track: Added FileInfo, FileDownloadInfo, TrackFullInfo, SimilarTracks types
Album: Added AlbumSimilarEntities, AlbumTrailer, SimilarEntityItem types
Artist: Added ArtistSimilar, ArtistLinks, ArtistAbout, ArtistInfo, ArtistSkeleton,
       ArtistTrailerStatus, ArtistLink, Stats, SkeletonBlock types

Client methods added:
- artists.go: GetArtistBriefInfo, GetArtistSimilar, GetArtistLinks, GetArtistAlsoAlbums,
  GetArtistDiscographyAlbums, GetArtistSafeDirectAlbums, GetArtistTrackIds, GetArtistAbout,
  GetArtistDonation, GetArtistInfo, GetArtistSkeleton, GetArtistTrailer
- albums.go: GetAlbumSimilarEntities, GetAlbumTrailer
- tracks.go: GetTracksFileInfo, GetTracksSimilar, GetTrackTrailer, GetTrackFullInfo

internal/client/tracks.go

@@ -6,6 +6,7 @@ import (
 	"crypto/md5"
 	"encoding/xml"
 	"fmt"
+	"strings"
 
 	"gitea.mrixs.me/Mrixs/yandex-music-api-go/internal/models"
 	"gitea.mrixs.me/Mrixs/yandex-music-api-go/internal/utils"
@@ -172,6 +173,57 @@ func (c *Client) DownloadTrack(ctx context.Context, trackID, format string, bitr
 	return c.request.Download(ctx, url)
 }
 
+// GetTracksFileInfo gets file info for a track (GET /get-file-info).
+func (c *Client) GetTracksFileInfo(ctx context.Context, trackID, quality string, codecs []string, transport string) (*models.FileInfo, error) {
+	params := map[string]string{
+		"track_id": trackID,
+		"quality":  quality,
+	}
+	if len(codecs) > 0 {
+		params["codecs"] = strings.Join(codecs, ",")
+	}
+	if transport != "" {
+		params["transport"] = transport
+	}
+
+	var result models.FileInfo
+	if err := c.request.Get(ctx, "/get-file-info", params, &result); err != nil {
+		return nil, err
+	}
+	result.SetClient(c)
+	return &result, nil
+}
+
+// GetTracksSimilar gets similar tracks (GET /tracks/{track_id}/similar).
+func (c *Client) GetTracksSimilar(ctx context.Context, trackID string) (*models.SimilarTracks, error) {
+	var result models.SimilarTracks
+	if err := c.request.Get(ctx, fmt.Sprintf("/tracks/%s/similar", trackID), nil, &result); err != nil {
+		return nil, err
+	}
+	result.SetClient(c)
+	return &result, nil
+}
+
+// GetTrackTrailer gets track trailer (GET /tracks/{track_id}/trailer).
+func (c *Client) GetTrackTrailer(ctx context.Context, trackID string) (*models.TrackTrailer, error) {
+	var result models.TrackTrailer
+	if err := c.request.Get(ctx, fmt.Sprintf("/tracks/%s/trailer", trackID), nil, &result); err != nil {
+		return nil, err
+	}
+	result.SetClient(c)
+	return &result, nil
+}
+
+// GetTrackFullInfo gets full track info (GET /tracks/{track_id}/full-info).
+func (c *Client) GetTrackFullInfo(ctx context.Context, trackID string) (*models.TrackFullInfo, error) {
+	var result models.TrackFullInfo
+	if err := c.request.Get(ctx, fmt.Sprintf("/tracks/%s/full-info", trackID), nil, &result); err != nil {
+		return nil, err
+	}
+	result.SetClient(c)
+	return &result, nil
+}
+
 // SearchResult represents search results containing tracks.
 type SearchResult struct {
 	Tracks *SearchTracksResult `json:"tracks"`