- Added new command to visit spanish page

This commit improves the error message displayed to users when they attempt to apply a code that has already been used with their account. Different language support is also added for the same

* Actions: Enable workflow run on fork PRs

Enable workflow run on fork PRs by verifying workflow trigger actor permission.
New workflow for build-and-test for fork PRs created.
Will likely need revised on develop.

Used for testing new workflow permissions.
Updates PR template with testing question.

Update build and test workflow by consolidating new and old versions into 1.
Because new workflow (pull request target) extends on old workflow, no need for both.

- added spam policy
- updated getting involved & feedback links