feat: Implementing infinityModel at public session route

[kushthedude]

Refers #3650
Fixes #4023

• Sessions were not rendering due to lack of space.
• Introduced infinity loader and checked the trigger offset, both are working quite well

[codecov]

Codecov Report

Merging #4022 into development will increase coverage by 0.11%.
The diff coverage is 0%.

@@               Coverage Diff               @@
##           development    #4022      +/-   ##
===============================================
+ Coverage        21.81%   21.93%   +0.11%     
===============================================
  Files              460      460              
  Lines             4726     4733       +7     
===============================================
+ Hits              1031     1038       +7     
  Misses            3695     3695

Impacted Files	Coverage Δ
app/routes/public/sessions/list.js	0% <0%> (ø)	⬆️
app/components/public/side-menu.js	0% <0%> (ø)	⬆️
app/components/forms/wizard/basic-details-step.js	25.97% <0%> (+1.31%)	⬆️
app/models/event.js	61.53% <0%> (+7.69%)	⬆️
app/helpers/payment-icon.js	80% <0%> (+80%)	⬆️

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[iamareebjamal]

Goal is to improve the code as we move on. "It was implemented this way" doesn't really work

[kushthedude]

@iamareebjamal done. Please merge

[kushthedude]

@iamareebjamal Please review now

[kushthedude]

@iamareebjamal Please Review and Merge now!

[kushthedude]

@iamareebjamal Check now