unlike the previous hack, libgrapheme is UNICODE 15.0 compliant (at the time of writing) and provides some nice API. While here, drop the hard wrap method for preformatted blocks: always use the normal wrapping. Since libgrapheme is not yet widely available, future commits will probably add a bundled version to ease packaging. I'll also start to replace various home-grown UNICODE/utf8 handling routines with functions from libgrapheme.

- be more like the kamid site: generate the HTML from a mixture of text/gemini and (bits of) html. - include the awesome logo by freezr - use (a modified version of) kamid' style.css - use mandoc.css - minor styling tweaks

while here mention the codeberg mirror on the web version too

these are unused after the fs/ui merge.

while here also do more validation in IMSG_GET_RAW and add a missing NULL check in the return type of req_by_id in the IMSG_CERT_STATUS.

just declare the same function in the two branches of #if HAVE_ASR_RUN to avoid further #ifs