chore(post): update copywriting for “Disable WYSIWYG”
fix(sitemap): duplicated URL definitions
chore(posts): use dedicated donate page for posts
fix(style): `.largetype` not centered
feat(donate): update copywriting
feat(template): more centered text for pages
feat(style): simplified align center method

All contents are center aligned now, crazy? no, I’m feeling good.
feat(style): update `text-align` method
feat(style): placeholder text color
feat(template): new email newsletter signup page