feat: created Initial Screen pattern

[joacotornello]

Type

• New feature 🌈

Changes proposed ✔️

Created InitialScreen pattern with its respective components: Section, Card, Bullet, Hero, Module and Feature.

JIRA: https://tiendanube.atlassian.net/browse/NIMBUS-16

[github-actions]

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.49%. Comparing base (2c6d5da) to head (c562b9c).
Report is 1 commits behind head on master.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master      #97      +/-   ##
==========================================
+ Coverage   89.42%   90.49%   +1.06%     
==========================================
  Files         135      149      +14     
  Lines         889      989     +100     
  Branches      140      150      +10     
==========================================
+ Hits          795      895     +100     
  Misses         89       89              
  Partials        5        5              

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