:)

tested that sed cmd, and it was not perfect, so i polished it a bit.

also add post excerpt functionality.

edit post layout to handle tags, add sort-by-tag page and edit
stylesheet according post content updates

this is not for real like blog posts, but for my telegram ones. they are
small and may be just written in plain on one page. of course, it'll
make this page too long, but to that time i'll find how to deal with it.