Support X links

Merge pull request #60 from juanolon/jump-to

jumpt to last position

Add Mathjax files to build step

Merge pull request #54 from juanolon/mathjax-fix

fix mathjax extension

Fix sitemap.xml path

add custom widget extension

use types.Map to replace Maps/Mutex pair

remove unused consts

Upgrade Golang to 1.22 and use new HTTP paths format

BREAKING CHANGES TO EXTENSIONS

If you developed an extension review your http handlers paths to make sure
they're still working. you must use the new format with GET,POST,DELETE
functions. instead of {name:regex} use {name} only and use r.PathValue instead
of Vars function

fix photo single page