[PowerRename]Add random string values to file names (#32836)

* Add randomizer cheat sheet texts to UI tooltip

* Add randomizer icon (shuffle) + hint to main window

* Add randomizer logic + helpers, regex parsing

* Fix: remove unnecessary throw

* Fix: remove todo comment

* Fix: iffing logic

* Fix: add offset to randomizer onchange

* Update: guid generating to single function, handle bracket removing there

* Update: toggle off enum feat when random values are selected

* Update: main window UI tooltip texts to be more descriptive

* Update: remove unnecessary sstream include

* Fix: return empty string if chars has no value to avoid memory access violation

* Add unit tests

* Add PowerRename random string generating keywords

* Update: generating value names to be in line with POSIX conventions

* Allow to used with Enumerate at the same time

* Fix spellcheck

* Fix tests to take into account we no longer eat up empty expressions
with randomizer

---------

Co-authored-by: Jaime Bernardo <jaime@janeasystems.com>

.github/actions/spell-check/expect.txt

@@ -1338,6 +1338,9 @@ RRF
 rrr
 rsop
 Rsp
+rstringalnum
+rstringalpha
+rstringdigit
 Rstrtmgr
 RTB
 RTLREADING
@@ -1352,6 +1355,7 @@ runtimeclass
 runtimeobject
 runtimepack
 runtimes
+ruuid
 rvm
 rwin
 rwl