fix: Fedora deps to build

[pythoninthegrass]

I'm on Fedora 42 x86_64. The readme is missing necessary dependencies to successfully build fm.

These are the truncated errors:

warning: poppler-sys-rs@0.24.0:
error: failed to run custom build command for `poppler-sys-rs v0.24.0`
warning: build failed, waiting for other jobs to finish...
warning: sourceview5-sys@0.9.0:
error: failed to run custom build command for `sourceview5-sys v0.9.0`
warning: build failed, waiting for other jobs to finish...
warning: libpanel-sys@0.5.0:
error: failed to run custom build command for `libpanel-sys v0.5.0`

I had to install the following:

sudo dnf install -y gtk4-devel libadwaita-devel libpanel-devel gtksourceview5-devel poppler-glib-devel

Then was able to run cargo build successfully 🎉

[pythoninthegrass]

FWIW passing the --release flag dropped the bin by almost 100mb (106mb -> 5.9mb)

I.e., cargo build --release