[Feature] Search function

[Tanjalibertatis]

Something should happen when pressing Ctrl+F,
kind of windows explorer search or windows start menu search or any other special search
see also #22

(Would be good if we can press stm shortcut, then Ctrl+F, then e.g. 'sys*.sln', then enter ... but sounds that we need to reimplement kind of windows search, so indicie files is probably not a option (to much efford? needs many system resources?), think about it)