standardize commonly used attributes

Some commonly used at maal attributes have been encoded as consts with
convinience wrappers similar to those of semconv package from otel sdk.
Additionally some utils that can generate mutliple attributes were added.

pkg/code_location/code_location.go

@@ -0,0 +1,13 @@
+package code_location
+
+type CodeLocation struct {
+	FilePath string
+	FuncName string
+	LineNumber int
+	ColumnNumber int
+}
+
+func FromStackTrace(...atDepth int) {
+	pc, file, line, _ := runtime.Caller(1 + skipLevelsInCallStack)
+	funcName := runtime.FuncForPC(pc).Name()
+}