[PIE-16] Basic tag page implementation (#13)

Adds `/tags/[name]` and associated API routes and such. `/tags/` has an extremely barebones layout atm so it's not publicly visible

Reviewed-on: #13
Co-authored-by: june <self@breadone.net>
Co-committed-by: june <self@breadone.net>

src/styles/global.css

@@ -7,4 +7,8 @@ html {
     /* @apply font-; */
     @apply font-sans;
     /* font-family: 'SF Pro Display', 'Segoe UI', 'Helvetica Neue', Arial, 'Noto Sans', sans-serif; */
+}
+
+.title {
+    @apply text-2xl;
 }