Add ffuf (security based tooling)

[copyleftdev]

added a security tool ffuf feroxbuster, it is commonly used by security researchers, I figured having an varied set of tools for webi would get more users in hope that translates to [Stars]

[coolaj86]

@copyleftdev I rebased these on master, so you'll need to git pull --rebase --force for further edits.

Can you update these examples to use something like pastebin or some companion tool that makes it more clear what they're doing? Or a honey pot site or local honey pot tool?

Also, these are missing ```sh code blocks for the examples.

[copyleftdev]

@coolaj86 I updated the ffuf readme

[coolaj86]

I squashed (git rebase -i main) all the commits and updated the Cheat Sheet after doing some research on ffuf myself.

[coolaj86]

@copyleftdev Will you open a new PR with feroxbuster and model the cheat sheet after my updates to ffuf?

https://webinstall.dev/ffuf

A copy of just the feroxbuster parts of the old PR is at at https://github.com/webinstall/webi-installers/compare/add-feroxbuster-old?expand=1, and it can be previewed at https://beta.webinstall.dev/feroxbuster

We want the Cheat Sheet to be something approachable for newbies that aren't already familiar with similar tools.

Things that were challenging in learning about fuff:

• it's not clear what a wordlist is, what format it's in, or where to get one
• it's not clear that FUZZ is a user-selectable substitution variable
• it's not clear what the results are expected to be

The installers should be pretty much copy/paste, but the Cheat Sheet is where it really takes someone who is familiar with the tool, and make it accessible to those who aren't.