build: mise en place de asciidoctor-revealjs

.gitignore

 /.idea/
+/.bundle/

Gemfile

+source 'https://rubygems.org'
+
+gem 'asciidoctor-revealjs'
\ No newline at end of file

Gemfile.lock

+GEM
+  remote: https://rubygems.org/
+  specs:
+    asciidoctor (2.0.23)
+    asciidoctor-revealjs (5.1.0)
+      asciidoctor (>= 2.0.0, < 3.0.0)
+
+PLATFORMS
+  arm64-darwin-23
+  ruby
+
+DEPENDENCIES
+  asciidoctor-revealjs
+
+BUNDLED WITH
+   2.5.9