NotRexed/Hookshot fast-updates on GitHub

Download HookshotBuilder.exe and run it, or accept the game's update offer.

Updates are small again

Every builder update recompiled the whole game (2+ hours) (#565, #562): each release installs into its own folder, and
the check for changed system headers counted that folder's path as a change, so both caches of compiled code were thrown
away. Now only real changes count. Updating to this release already reuses what your last build compiled. Tested
here from two separate install folders: the second update compiled 3 files in 10 seconds instead of 579.

Memory the GPU had used is no longer given back on Windows. Giving it back was meant for a Linux AMD driver, and on
Windows it was followed by device lost on Intel Arc (#17) and on AMD (Ally X #309, RX 6600 #571). If you had device lost,
please try this release and tell us. (RX_VK_KEEP_RETIRED=0 brings back the old behaviour.)

HookshotBuilder.exe tries 8 times over ~3 minutes during GitHub outages, alternating GitHub's download link and its
API, retries a download that was cut off, and keeps the parts it already has, so running it again carries on (#558).
The game's update offer retries too and uses GitHub's API when the release link fails (PR #555 by yeetbot90).
"Can't be read" on a game file now says why, in the file's row (#563).
After preparing shaders, the pipeline cache is saved at once (PR #559 by klimovich008: less stutter on AMD).

Everything from low-vram is in here.

Persist the pipeline cache after shader preparation by @klimovich008 in #559
CI: Linux AppImage no longer fails on GitHub 504s; Windows make_game cache test stubs stop_stray_compilers by @amaralthalesalves in #556
Fix Builder updater download retries by @yeetbot90 in #555
Keep multi-second frames in the requested slow log by @klimovich008 in #568

Full Changelog: low-vram...fast-updates