Properly handle optional event modes

[sholderbach]

Both bracketed paste and the kitty keyboard enhancement flag are not always supported.
This goes both for terminals that may not emit events according to the extensions thus we already provide the means to only optionally enable them.
But also the applications that may run between each Reedline::read_line call are in no way guaranteed to supported any enhanced terminal events coming in.
It should thus be part of reedline's contract to leave read_line in a clean state with the canonical terminal behavior.

The API for Reedline::enable_bracketed_paste was misleading as it for the most part acted independent of the Reedline state and immediately globally enabled bracketed paste, potentially polluting any application during evaluation. disable_bracketed_paste equally globally modified state but was only active if the bracketed paste state was entered with enable_bracketed_paste and would only run once.

For better readability transfer this pattern to the kitty keyboard enhancement protocol. (which was already properly handled but was overly eager to check if the enhancements are supported on every read_line)

Make sure we enter the mode when starting to take control and exit the mode when leaving the mode or being dropped.
The settings exposed to the user will just internally enable a setting (in the case of the kitty keyboard enhancement flags crossterm provides an easy way to check for support that we take into account with that)

Close nushell/nushell#10982 and related issues for non-nushell projects using reedline

As a follow up we can simplify the setters to ignore the Result or collapse it to a simpler fn use_...(self, enable: bool)

[codecov]

Codecov Report

Merging #659 (cde7c89) into main (c853d71) will decrease coverage by 0.04%.
Report is 3 commits behind head on main.
The diff coverage is 19.04%.

@@            Coverage Diff             @@
##             main     #659      +/-   ##
==========================================
- Coverage   49.22%   49.19%   -0.04%     
==========================================
  Files          43       46       +3     
  Lines        7912     7930      +18     
==========================================
+ Hits         3895     3901       +6     
- Misses       4017     4029      +12     

Files	Coverage Δ
src/terminal_extensions/mod.rs	0.00% <0.00%> (ø)
src/engine.rs	4.99% <16.66%> (-0.16%)	⬇️
src/terminal_extensions/bracketed_paste.rs	23.80% <23.80%> (ø)
src/terminal_extensions/kitty.rs	18.51% <18.51%> (ø)

... and 1 file with indirect coverage changes

[fdncred]

Nice work @sholderbach!!

[fdncred]

are we going to land this before the release or after?