added fedora support in install-dev-dependencies

[t3dium]

as the packages are named differently on fedora, so it makes the process of installing iridium a bit simpler, rather than having to hunt for dependency packages, (ignored packages already preinstalled on fedora)

whiptail is also already included in debian/fedora based systems

also, are you planning to submit the flatpak build to flathub? currently the only way to install iridium on non-elementary os distros is to build from source