feat(refacto): move everything in internal package

This allows to install katenary with `go install` and to clean up the
project folder.

internal/generator/globals.go

@@ -0,0 +1,20 @@
+package generator
+
+import (
+	"regexp"
+
+	"github.com/katenary/katenary/internal/generator/labels"
+)
+
+var (
+	// find all labels starting by __replace_ and ending with ":"
+	// and get the value between the quotes
+	// ?s => multiline
+	// (?P<inc>.+?) => named capture group to "inc" variable (so we could use $inc in the replace)
+	replaceLabelRegexp = regexp.MustCompile(`(?s)__replace_.+?: '(?P<inc>.+?)'`)
+
+	// Standard annotationss
+	Annotations = map[string]string{
+		labels.LabelName("version"): Version,
+	}
+)