Simplify site config editor

[jeparlefrancais]

Closes #121

This avoid the issue where the configuration is passed through the json5 javascript library and then to darklua, I simplified the text editor to directly send the written config to the darklua wasm build.

There are still some weird behavior when writing some large numbers in the web editor, but I suspect it may be related to how darklua wasm processes floats.

[github-actions[bot]]

Coverage after merging site-simplify-config-editor into main will be

87.11%

Coverage Report for Changed Files

File	Stmts	Branches	Funcs	Lines	Uncovered Lines
src/nodes/expressions
mod.rs	77.34%	100%	77.50%	77.30%	129–131, 135–137, 141–143, 147–149, 153–155, 159–161, 177–179, 183–185, 261, 307–310, 312, 85–90