Define templates for issues / pull request in all repositorioes

[pferrariuy]

In each of the repositories, create templates for issues / pull request, using as starting point the templates definen in the solarec repository:

• https://github.com/Renovus-Tech/solarec/blob/main/PULL_REQUEST_TEMPLATE.md
• https://github.com/Renovus-Tech/solarec/blob/main/NEW_FEATURE_REQUEST_TEMPLATE.md
• https://github.com/Renovus-Tech/solarec/blob/main/ISSUE_TEMPLATE.md