v0.2.0-rc1: 1st RC to test CRAN submission This is the first release candidate to be submitted to CRAN. The purpose of the v0.2.0 release is to ensure that `calendRio` meets the CRAN requirements before moving towards a 1.0 release that actually adds functionality on top of the upstream `calendR` package. Release candidates are tagged on the corresponding release branch (branched off from the development branch) before merging to the main branch. This allows for additional fixes before the actual release. Once the new version was successfully submitted to (and accepted by) CRAN, the release branch is merged to the main branch and the resulting merge commit is tagged as release. Changes since v0.1.0: * Documentation: * Add header comments * Re(/sub-)license: MIT -> AGPL-3.0-or-later * Chores: * Bump version to 0.2.0