feat: chimera linux brl-fetch port

[slbsh]

A brl-fetch target for Chimera Linux.
Huge thanks to the chimera people for help :)

[JamiKettunen]

This would supercede #298, check the recent mirror comment from me there if you want to include it here

[netkv]

Did quick testing, it seems to get stuck at

[ 4/14 ( 28%)] Determining mirror
* Checking bedrock.conf [brl-fetch-mirror] items
[\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\] 100%

no idea why it gets stuck but after removing the other mirror and changing list-mirrors function into

list_mirrors() {
    echo "https://repo.chimera-linux.org"
}

it fetches just fine and resulting stratum seems to work, so otherwise than that detail great job 👍🏻

[slbsh]

I blame @JamiKettunen lmao, gonna undo that one

[JamiKettunen]

:shrug: I can load https://au.mirror.7bit.org/chimera from EU even if latency is around a second, sounds like something the mirror tester definitely should be able to handle (no idea how it works) and subsequently skip if latency is way too high

[netkv]

looking at it more, it doesn't seem to have anything with mirror (btw im in EU) (i think if it was mirror speed issue it'd get stuck right after, with bedrock showing number of mirrors it decides from like * Finding fastest mirror from 2)

judging by set -x it seems like it gets stuck at cat tried following and it works

list_mirrors() {
    echo "https://repo.chimera-linux.org
https://au.mirror.7bit.org/chimera
"
}

no idea why cat heredec doesnt work, it should achieve same result, but maybe my shell knowledge is rusty btw does it work for you? i assume yes if that's so, that's odd, no idea why it'd be different (btw im using latest bedrock (0.7.31beta2) to test it on)