docs: drop winget from the install options until the package is approved
docs: link the Store images from their lowercase folder, and LinkUnbound to its own site
docs: show the new Store images on every page, the MCP one included, and drop the ones replaced
docs: describe the read-only window for Markdown files, tisty:// links, documents and widgets
docs: link Tisty's site and the code of conduct from the home pages
docs: add the Spanish wiki and a bilingual sidebar, and name the PDF paper sizes the app offers