Expanded linting + fix warnings (#1396)

* Expand the linters and types of warnings to improve consistency and safety

* Fail lint workflow if there are errors

* golint has been replaced by revive

* Hand-pick some of the default exclude list

* Ignore error when trying to delete preview gif

* Ignore linter warning opening playlist path

* Rename user field Id -> ID

* A bunch of renames to address linter warnings

* Rename ChatClient -> Client per linter suggestion best practice

* Rename ChatServer -> Server per linter suggestion best practice

* More linter warning fixes

* Add missing comments to all exported functions and properties

core/streamState.go

@@ -110,7 +110,7 @@ func SetStreamAsDisconnected() {
 			log.Warnln(err)
 		}
 		if utils.DoesFileExists(playlistFilePath) {
-			f, err := os.OpenFile(playlistFilePath, os.O_CREATE|os.O_RDWR, os.ModePerm)
+			f, err := os.OpenFile(playlistFilePath, os.O_CREATE|os.O_RDWR, os.ModePerm) //nolint
 			if err != nil {
 				log.Errorln(err)
 			}