Restructure go project (#2356)

* Move main to cmd
* Move api to internal
* Move logger and manager to internal
* Move shell hiding code to separate package
* Decouple job from desktop and utils
* Decouple session from config
* Move static into internal
* Decouple config from dlna
* Move desktop to internal
* Move dlna to internal
* Decouple remaining packages from config
* Move config into internal
* Move jsonschema and paths to models
* Make ffmpeg functions private
* Move file utility methods into fsutil package
* Move symwalk into fsutil
* Move single-use util functions into client package
* Move slice functions to separate packages
* Add env var to suppress windowsgui arg
* Move hash functions into separate package
* Move identify to internal
* Move autotag to internal
* Touch UI when generating backend

pkg/ffmpeg/media_detection.go

@@ -38,11 +38,11 @@ func containsMatroskaSignature(buf, subType []byte) bool {
 	return buf[index-3] == 0x42 && buf[index-2] == 0x82
 }
 
-// MagicContainer returns the container type of a file path.
+// magicContainer returns the container type of a file path.
 // Returns the zero-value on errors or no-match. Implements mkv or
 // webm only, as ffprobe can't distinguish between them and not all
 // browsers support mkv
-func MagicContainer(filePath string) Container {
+func magicContainer(filePath string) Container {
 	file, err := os.Open(filePath)
 	if err != nil {
 		logger.Errorf("[magicfile] %v", err)