Fix missing deps and roxygen2 version in deploy workflow

Add tidymodels and here to DESCRIPTION Suggests so remotes::install_deps
picks them up in CI. Explicitly install roxygen2 in deploy.yaml to ensure
version >= 7.3.3 is available, matching the RoxygenNote declared in DESCRIPTION.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitea/workflows/deploy.yaml

@@ -36,7 +36,7 @@ jobs:
         # First install 'renv' or 'remotes', then install project dependencies
         # Using remotes here as it's typically faster for CI if renv cache isn't available
         run: |
-          Rscript -e "install.packages(c('remotes', 'styler'))"
+          Rscript -e "install.packages(c('remotes', 'styler', 'roxygen2'))"
           Rscript -e "remotes::install_deps(dependencies = TRUE)"
 
       - name: Run Build Script