Ignite 13779 (#63)

* initial rework of features  section  on the homepage

* more adjustments to new features section; menu opens with hover; responsiveness fixes; other minor tweaks

* reworked the main banner design; also updated the architects section with  diagrams; some responsiveness and other small css issues fixed

* updated diagram for db use case

* changes to Architects section; new diagrams; tweaks on css for features

* implementing accordion

* fixed height for white area under features section

* added accordion markup and reordered sections

* swapped places for features; updates on the banner; added users logos section; added documentationt to navigation;

* fixed small alignment issues; font for features section; added ParticleJS effect to main banner

* multiple changes to layout and homepage

* updated use-cases section on the homepage; list of logos; finished accordion for features section on mobile

* updated the docs navigation with API links; examples; and language selector

* rebuilt docs with the new template

* added dutch railways

* updated users logos; updated DB diagram and fixed alignments; updated footer content

* updated nav for documentation; rebuilt it with new templates

* reordered features and added GA events for tabs; removed shadows; adjusted size for 2nd line on banner; also added icon to button on banner

* adjusted grayscale for logos

* several optimization for mobile screen sizes

* made the links under Example to open on a new tab

* more fixes for responsiveness on small screeens

* did a few performance optimizations

* fixed long titles for accordion widget; also updated diagram on homepage

* responsive: moved learn more buttons below the diagrams on use-cases section

* adjusted gray color and line-height for features paragraph

* added critical css; and updated how some scripts are loaded
6 files changed