Ship Slack's own x86_64 build unchanged so Omarchy controls the package
on both architectures instead of relying on the AUR recipe for x86_64.
The Electron swap and native module replacements stay AArch64-only.
Slack only publishes an x86_64 Linux build, so the AUR recipe produces an
aarch64 package full of x86_64 binaries that cannot start. Run Slack's
application code on the AArch64 build of the Electron release it ships
with, replace the three native addons Slack requires at boot with
JavaScript equivalents, and drop the x86_64 addons it can do without.
Ryan Hughes