misc webpack tweaks (#9924)

- reduce verbosity during build
- use array form `use` to allow easier extension
- disable uninteresting source maps
- disable symlink resolution for a speedup

Co-authored-by: zeripath <art27@cantab.net>
Co-authored-by: techknowlogick <matti@mdranta.net>

Makefile

@@ -479,7 +479,7 @@ js: node-check fomantic $(JS_DEST)
 
 $(JS_DEST): node_modules $(JS_SOURCES)
 	npx eslint web_src/js webpack.config.js
-	npx webpack
+	npx webpack --hide-modules --display-entrypoints=false
 
 .PHONY: fomantic
 fomantic: node-check $(FOMANTIC_DEST_DIR)