Adding system folders check and additional binary checks

[D3vil0p3r]

I am using Arch Linux and I'm trying to set up Osmedeus at system-level by building from source.

The only issues I see are pretty naive and are the following:

Currently Osmedeus is searching for osmedeus-base in $HOME folder. Since some users would like to set up Osmedeus at system-level (just think in a laboratory where a single computer is used by more users), can you add a check that checks for osmedeus-base not only on ~/osmedeus-base but also /usr/share/osmedeus-base? This change must be done in cmd/root.go.

Same for ~/nuclei-templates and adding further check for /usr/share/nuclei-templates installed at system level. This change must be done in cmd/health.go.

Same for binaries folder in core/config.go because it would be nice to deal this folder as an array of directories where to check binaries not only in osmedeus-base/binaries but also in /usr/bin. In this manner, a user prevents the installation of a tool that was already installed in the system and placed in the standard /usr/bin directory.

Last but not least, in Arch Linux httpx package renamed its binary as httpx-pd. Could you please add a check not only on httpx binary but also on httpx-pd in cmd/health.go? And be sure that the correct binary is invoked by Osmedeus when needed (i.e., if httpx-pd exists, Osmedeus must invoke httpx-pd; if httpx binary exists, Osmedeus must invoke httpx).