Change the template strategy: allow custom templates from packages

Proposal:

• don't copy the templates at the root of the fairified project
• copy only the necessary templates in the report folder during render:
  • use .template_dependencies file in the report folder and in the template folder to list necessary templates
  • syntax of the file is [package]:[template name] for example fairify:inrae
  • the .template_dependencies in the template folder ensures to process the dependencies in a recursion for copying the templates during render
  • use on.exit for deleting the templates after rendering
• change all paths ../../templates by templates

changed milestone to %v0.2.0

added enhancement label

assigned to @david.dorchies

created branch 23-change-the-template-strategy-allow-custom-templates-from-packages to address this issue

mentioned in merge request !4 (merged)

mentioned in commit 1cea7765

mentioned in commit 4a2d1986

mentioned in commit 54d1c38e

mentioned in commit b36e4b89

closed with merge request !4 (merged)

mentioned in commit e4d5c040