Add mustache to dev env

[smaarn]

Description

mustache is a very simple template language which could be used to easily generate internationalized wizards.

This is an attempt to integrate it in the dev environment and would be a prerequisite for #5817

Homepage: https://mustache.github.io/

Checklist

• Any needed documentation is updated/created

Type of change

• Includes small framework changes
• This change requires a documentation update (e.g. Wiki)

[smaarn]

TBH there is this still the documentation which could be added about the "how to use it".

[hgy59]

@smaarn I had to break the identation to limit the single RUN command to install packages.

and added zip package for a future removement of native/zip...

@th0ma7, @publicarray, @mreid-tt can you have a second look on the wizard generation from templates?

[th0ma7]

Nicely done.

[hgy59]

LGTM

[hgy59]

@smaarn
BTW normally I used to add a custom build step to install packages before they are available in the dev env with

   sudo apt-get update
   sudo apt-get install ruby-mustache

but due to the sudo file error (fixed here) this did not work in spksrc containers on my newer dev machine with debian bookworm.

[smaarn]

I reworked to add "native" variables usable in switches:

• IS_DSM_6_OR_GREATER (true if DSM version is >= 6.0)
• IS_DSM_7_OR_GREATER (true if DSM version is >= 7.0)
• IS_DSM_6 (true if DSM version >= 6.0 and < 7.0)
• IS_DSM_7 (true if DSM version >= 7.0)

This allows to tailor templates depending on the DSM version (without even using shell scripts !)

[mreid-tt]

@smaarn, I see the wizards in cops and I like them. I'd like to incorporate in the next update to owncloud. Will the template also work for install_uifile.sh files? If so, would the language file be called install_uifile.sh.yml?

I also note you introduced a new variable WIZARDS_TEMPLATES_DIR but I don't see documentation of how to use it in https://github.com/SynoCommunity/spksrc/wiki/Makefile-variables. Perhaps an update there and a mention on it's use with WIZARDS_DIR?

EDIT: I've tried a build for owncloud using mustache for wizards however no files were generated as part of #5912. Can you help review where I may have gone wrong?