when re-doing makefile, I removed the part where CSS is written to
bundle.css, then later moved to v3bundle.css. To solve, crash.html now
just directly requests web/css/v3bundle.css (and web/js/crash.js,
removing the `mv` line in the makefile too).
unnecessary (inline-source-cli already includes its functionality) and a
dependency of it had a high-severity CVE (wouldn't have affected anyone,
but w/e).
The last 100 lines of logs are now cached, and when a crash occurs, they
are saved to a file in the temp directory ("/tmp" on *nix), and pretty
HTML version is also created and opened in the browser.
* Currently only handles panics, will be included in more places soon
* Copy button and button to generate a GH issue will be added
