[Web-IDE] Add some kind of close/cleanup/remove all files type feature

[0xdevalias]

Sometimes when I am quickly jumping through different files I want to unpack, I've found it would be nice if there was a 'close current project' type feature, that would close/remove/cleanup all of the unpacked module files.

Sometimes I am wanting to do this so I can unpack the same file again with a 'clean working directory' (eg. when I was testing https://github.com/j4k0xb/webcrack/issues/147 to ensure it was doing what I thought it was); sometimes I just want to close everything and move on to something else entirely.

Current alternatives / workarounds:

• reload the tab, which will give me a clean slate