feat: created Formation page and components

README.md

blog/DevopsMindset.md

docusaurus.config.js

package-lock.json

src/components/FormationButton.js

src/css/course-cards.css

src/css/custom.css

src/theme/BlogLayout/index.js

src/theme/BlogListPage/index.js

src/theme/BlogPostItem/index.js

static/formations/devopsmindset.jpg