[DRAFT] use foundry & remove js

[wminshew]

Started as an interesting experiment & now opening this draft PR to continue the conversation. Goal was to get rid of all js / dependencies to make it easy to import & use via foundry. Ultimately ended up using parcel (installed globally) for hot-reloading. Definitely won't make sense to merge this, but might be interesting to take bits & pieces of it or pull together something more polished for merging

test with:

chmod +x hot-chain-svg.sh
./hot-chain-svg.sh

(can also just run these two commands in separate terminals for a marginally more cumbersome yet cleaner experience)

notes:

• the "Hello, token" string doesn't appear to be rendering, not sure why (I know very little about svgs so I didn't bother trying to debug -- from the browser inspector it looks like it's getting commented out but not sure why)

<text x="20" y="40" font-size="22" fill="white"><!--[CDATA[Hello, token #]]-->1</text>

• noticing the below errors from forge t --watch -- doesn't seem to prevent it from working, but obviously not ideal. Might just be a foundry bug? or I might be mis-using the vm.writeFile cheatcode somehow

[⠒] Compiling...2022-10-13T05:09:09.341469Z ERROR watchexec::command::supervisor: while waiting on process err=io(waiting on process group): No child processes (os error 10)
2022-10-13T05:09:09.341538Z ERROR watchexec::watchexec: runtime error err=io(waiting on process group): No child processes (os error 10)
2022-10-13T05:09:09.424690Z ERROR watchexec::command::supervisor: while waiting on process err=io(waiting on process group): No child processes (os error 10)
2022-10-13T05:09:09.424737Z ERROR watchexec::watchexec: runtime error err=io(waiting on process group): No child processes (os error 10)
[⠃] Compiling...2022-10-13T05:09:09.688119Z ERROR watchexec::command::supervisor: while waiting on process err=io(waiting on process group): No child processes (os error 10)
2022-10-13T05:09:09.688198Z ERROR watchexec::watchexec: runtime error err=io(waiting on process group): No child processes (os error 10)