Support eduroam on IWD clients (#24)

* moved certificate to separate file

* initial eduroam support for iwd

* flake update

* added iwd function calls

* unindented message

* made iwd and nmcli act similar

* fix small issues with gettings credentials

* updated system messages

* uppercased letter in autoconnect

* change indentation to 2 spaces

* added offline fallback for the certificate

* used fail fast with curl for better error handling

* corrected spelling and grammar

* removed awk used for profile check

* change strategy for checking state

* fixed mistake in nmcli command

* updated logic for checking network manager

* corrected spelling mistake

* corrected certificate placment

* corrected mistake in iwd profile

* moved cert to satisfy perms

ca_eduroam.pem

@@ -0,0 +1,108 @@
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+-----BEGIN CERTIFICATE-----
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----

flake.nix

@@ -17,7 +17,6 @@
       buildInputs = builtins.attrValues { inherit (pkgs) gawk ; };
 
       installPhase = ''
-        install -Dm 755 "iwd.sh" "$out/bin/iwd.sh"
         install -Dm 755 "setup.sh" "$out/bin/dtuconnect"
       '';