Add Shiny app, tests, vignette, and CI

.Rbuildignore

@@ -0,0 +1,3 @@
+^.*\.Rproj$
+^\.Rproj\.user$
+^\.github$

.github/.gitignore

@@ -0,0 +1 @@
+*.html

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

@@ -0,0 +1,30 @@
+# Workflow derived from https://github.com/r-lib/actions/tree/v2/examples
+# Need help debugging build failures? Start at https://github.com/r-lib/actions#where-to-find-help
+on:
+  push:
+  pull_request:
+
+name: R-CMD-check.yaml
+
+permissions: read-all
+
+jobs:
+  R-CMD-check:
+    runs-on: ubuntu-latest
+    env:
+      GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
+      R_KEEP_PKG_SOURCE: yes
+    steps:
+      - uses: actions/checkout@v6
+
+      - uses: r-lib/actions/setup-r@v2
+
+      - uses: r-lib/actions/setup-r-dependencies@v2
+        with:
+          extra-packages: any::rcmdcheck
+          needs: check
+
+      - uses: r-lib/actions/check-r-package@v2
+        with:
+          upload-snapshots: true
+          build_args: 'c("--no-manual","--compact-vignettes=gs+qpdf")'

.gitignore

@@ -0,0 +1,5 @@
+.Rproj.user
+.Rhistory
+.RData
+.Ruserdata
+inst/doc

DESCRIPTION

@@ -19,7 +19,12 @@ Encoding: UTF-8
 LazyData: true
 RoxygenNote: 7.3.3
 Imports:
-  checkmate (>= 2.3.4)
+    checkmate (>= 2.3.4),
+    shiny (>= 1.13.0)
 Suggests: 
+    knitr,
+    rmarkdown,
+    shinytest2,
     testthat (>= 3.0.0)
 Config/testthat/edition: 3
+VignetteBuilder: knitr

NAMESPACE

@@ -1,9 +1,9 @@
 # Generated by roxygen2: do not edit by hand
 
-export(create_manual_sequence)
 export(generate_sequence)
 export(get_card_states)
-export(get_current_number)
 export(is_winner)
 export(run_app)
+export(validate_manual_sequence)
+import(shiny)
 importFrom(checkmate,assert_numeric)