feat: Enhance texture upload functionality and API response format

- Introduced a new upload endpoint for direct texture file uploads, allowing users to upload textures with validation for size and format.
- Updated existing texture-related API responses to a standardized format, improving consistency across the application.
- Refactored texture service methods to handle file uploads and reuse existing texture URLs based on hash checks.
- Cleaned up Dockerfile and other files by removing unnecessary whitespace.

internal/model/texture.go

@@ -20,12 +20,12 @@ type Texture struct {
 	Description   string      `gorm:"column:description;type:text" json:"description,omitempty"`
 	Type          TextureType `gorm:"column:type;type:varchar(50);not null;index:idx_textures_public_type_status,priority:2" json:"type"` // SKIN, CAPE
 	URL           string      `gorm:"column:url;type:varchar(255);not null" json:"url"`
-	Hash          string      `gorm:"column:hash;type:varchar(64);not null;uniqueIndex:idx_textures_hash" json:"hash"` // SHA-256
+	Hash          string      `gorm:"column:hash;type:varchar(64);not null;index:idx_textures_hash" json:"hash"` // SHA-256
 	Size          int         `gorm:"column:size;type:integer;not null;default:0" json:"size"`
 	IsPublic      bool        `gorm:"column:is_public;not null;default:false;index:idx_textures_public_type_status,priority:1" json:"is_public"`
 	DownloadCount int         `gorm:"column:download_count;type:integer;not null;default:0;index:idx_textures_download_count,sort:desc" json:"download_count"`
 	FavoriteCount int         `gorm:"column:favorite_count;type:integer;not null;default:0;index:idx_textures_favorite_count,sort:desc" json:"favorite_count"`
-	IsSlim        bool        `gorm:"column:is_slim;not null;default:false" json:"is_slim"` // Alex(细) or Steve(粗)
+	IsSlim        bool        `gorm:"column:is_slim;not null;default:false" json:"is_slim"`                                                                                                        // Alex(细) or Steve(粗)
 	Status        int16       `gorm:"column:status;type:smallint;not null;default:1;index:idx_textures_public_type_status,priority:3;index:idx_textures_uploader_status,priority:2" json:"status"` // 1:正常, 0:审核中, -1:已删除
 	CreatedAt     time.Time   `gorm:"column:created_at;type:timestamp;not null;default:CURRENT_TIMESTAMP;index:idx_textures_uploader_created,priority:2,sort:desc;index:idx_textures_created_at,sort:desc" json:"created_at"`
 	UpdatedAt     time.Time   `gorm:"column:updated_at;type:timestamp;not null;default:CURRENT_TIMESTAMP" json:"updated_at"`