[feature] Maestro Layout

[ibelar]

A new layout based on the admin layout with improve left menu.

• Indicate which group and page you are in;
• Collapsable group;
• Clicking on a group title will bring you to the first menu item in the group;
• Proper group open on page load

Note

Require atkjs-ui.min.js v1.14.0
Change default admin for demos to use Maestro.

[codecov]

Codecov Report

Merging #1120 into develop will increase coverage by 0.23%.
The diff coverage is 88.88%.

@@              Coverage Diff              @@
##             develop    #1120      +/-   ##
=============================================
+ Coverage      75.61%   75.85%   +0.23%     
- Complexity      2659     2765     +106     
=============================================
  Files            128      130       +2     
  Lines           6253     6381     +128     
=============================================
+ Hits            4728     4840     +112     
- Misses          1525     1541      +16     

Impacted Files	Coverage Δ	Complexity Δ
src/Layout/Admin.php	89.65% <75.00%> (-6.00%)	11.00 <3.00> (+3.00)	⬇️
src/Layout/Maestro.php	100.00% <100.00%> (ø)	4.00 <4.00> (?)
src/Menu.php	90.90% <100.00%> (ø)	25.00 <3.00> (ø)
src/CardDeck.php	66.66% <0.00%> (-0.40%)	89.00% <0.00%> (+4.00%)	⬇️
src/Locale.php	100.00% <0.00%> (ø)	2.00% <0.00%> (ø%)
src/Panel/Content.php	100.00% <0.00%> (ø)	8.00% <0.00%> (+2.00%)
src/ActionExecutor/jsEvent.php	0.00% <0.00%> (ø)	32.00% <0.00%> (+9.00%)
src/ActionExecutor/jsArgumentForm.php	0.00% <0.00%> (ø)	20.00% <0.00%> (+8.00%)
src/TableColumn/HTML.php	100.00% <0.00%> (ø)	2.00% <0.00%> (?%)
... and 11 more

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[DarkSide666]

Looks good