Strip control characters from pasted text

We ignore typed control characters 33a7172ee (Revert to not inserting control
characters from keyboard input, 2024-03-02).

We used to do the same for bracketed paste but that changed in 8bf8b10f6
(Extended & human-friendly keys, 2024-03-30) which made bracketed paste
behave like fish_clipboard_paste; it inserts the exact input (minus leading
whitespace etc). At that time it wasn't clear to me which behavior was the
right one (because of the inconsistency between terminal and bracketed paste).

As reported in
https://matrix.to/#/!YLTeaulxSDauOOxBoR:matrix.org/$PEEOAoyJY-644amIio0CWmq1TkpEDdSy2QnfJdK-dco
trailing tabs in pasted text can be confusing.

There seems to be not real need to insert raw control characters into the
command line, so let's strip them when pasting.

Now the only way to insert a raw control character into the command line is
to recall it from command history.  Not sure what the behavior should be for
that case, we can revisit that later. If we get rid of raw control characters
entirely, then we can also delete the new "control pictures" rendering :)

share/functions/__fish_paste.fish

@@ -1,6 +1,7 @@
 function __fish_paste
     # Also split on \r, otherwise it looks confusing
     set -l data (string split \r -- $argv[1] | string split \n)
+    set data (string replace -ra [[:cntrl:]] '' -- $data)
 
     if commandline --search-field >/dev/null
         commandline --search-field -i -- $data