[config] Add .Files.Glob Go template function

{{ range $path, $content := .Files.Glob ".werf/files/**" }}
{{ $path }}: |
{{ $content | indent 2 }}
{{ end }}

Process symlinks with .Files.Glob
.Files.Glob returns the hash of regular files and their contents for the paths that are matched pattern. This function follows only symlinks pointed to a regular file (not to a directory).
.Files.Glob: has an ability to merge results
The function supports shell pattern matching + **. Results can be merged with merge sprig function (e.g {{ $filesDict := merge (.Files.Glob "*/*.txt") (.Files.Glob "app/ **/*.txt") }})

Installation