[FEATURE] - ADD PRE-RENDER COMMAND

[patrick-hermann-sva]

STORY:

• we want to use var refs out of a dict but we do not no inside the template which dict keys will be used. so we should have a prerender command to render the template before actualy render it :-)

machineshop render \
--source local \
--template ../golang/machineshop/tests/template-square.yaml \
--brackets square \
--output stdout \
--prerender true \
--prerenderbrackets curly  \
--prerendervars "this=[[ .vmConfig_l_cpu ]], andThis= [[ .vmConfig_l_ram]]"  \
--defaults /home/sthings/projects/stuttgart-things/packer/environments/labul-pve.yaml

TEST

cpu: {{ .this }}
ram: {{ .andThis }}

machineshop render --template /tmp/tpl.yaml --source local --values "this={{ .vmConfig_l_cpu }},andThis={{ .vmConfig_l_ram }}"```