feat: Use brand.yml R package (#1227)

* feat: Use `brand.yml` R package

* fix: remote to brand.yml on github

* ci: updated brand.yml

* ci(routine): Tidy description to avoid circular commits

* chore: fix DESCRIPTION from bad merge

* chore: use brand.yml from CRAN

* feat: skip finding `_brand.yml` if brand.yml is not installed

* tests: skip appropriate tests if brand.yml is not installed

* chore: skip depends-only check

* tests: skip if rmarkdown is not installed

* chore: Add NEWS bullet

Author: gadenbuie

.github/workflows/R-CMD-check.yaml

@@ -21,6 +21,8 @@ jobs:
       format-r-code: true
   R-CMD-check:
     uses: rstudio/shiny-workflows/.github/workflows/R-CMD-check.yaml@v1
+    with:
+      check-depends-only: false
   deploy:
     if: github.repository == 'rstudio/bslib' && github.event_name == 'push'
     runs-on: ubuntu-20.04

DESCRIPTION

@@ -42,6 +42,7 @@ Imports:
     rlang,
     sass (>= 0.4.9)
 Suggests:
+    brand.yml,
     bsicons,
     curl,
     fontawesome,

NEWS.md

@@ -1,5 +1,9 @@
 # bslib (development version)
 
+## Breaking changes
+
+* bslib now uses the `{brand.yml}` package for reading [brand.yml](https://posit-dev.github.io/brand.yml) files. This change improves compatibility with other tools that use brand.yml files, such as Quarto. The `{brand.yml}` package must be installed for `_brand.yml` files to be automatically discovered. (#1227)
+
 ## New features
 
 * Added a new `input_submit_textarea()` input element, which is similar to `shiny::textAreaInput()`, but includes a submit button to only submit the text changes to the server on click. This is especially useful when the input text change triggers a long-running operation and/or the user wants to type longer-form input and review it before submitting it. (#1204)