Enhance README, docs, and examples

[tylerhutcherson]

This PR enhances the quality of the RedisVL README:

• Improved layout optimized for readability
• Emojis for the eye pop effect
• Links to docs
• Simple code examples
• Fixes https://github.com/RedisVentures/redisvl/issues/115
• Fixes https://github.com/RedisVentures/redisvl/issues/89

[codecov-commenter]

Codecov Report

Attention: 12 lines in your changes are missing coverage. Please review.

Comparison is base (8d38801) 80.62% compared to head (7500f30) 80.65%.

Files	Patch %	Lines
redisvl/index/index.py	47.61%	11 Missing ⚠️
redisvl/query/query.py	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #105      +/-   ##
==========================================
+ Coverage   80.62%   80.65%   +0.02%     
==========================================
  Files          25       25              
  Lines        1476     1473       -3     
==========================================
- Hits         1190     1188       -2     
+ Misses        286      285       -1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[bsbodden]

LGTM!