(build): fix obscure "Cannot access 'x' before initialization" error
(build): fix obscure "Cannot access 'x' before initialization" error

There seems to be a circular dependency of some sort when
`rollupOptions.output.manualChunks` creates two separate "shared"
chunks : one for node_modules/* and another "common" chunk for our
app's shared code (shared between entries).

Shoving all "shared" code into the same chunk seems to resolve this.

fabd/kanji-koohii,kanji-koohii/kanji-koohii,kanji-koohii/kanji-koohii,fabd/kanji-koohii,kanji-koohii/kanji-koohii,kanji-koohii/kanji-koohii,kanji-koohii/kanji-koohii,fabd/kanji-koohii,fabd/kanji-koohii,fabd/kanji-koohii,fabd/kanji-koohii