DOC-2544: replace VSS tutorial and move orig. content

[dwdougherty]

Describe the changes in the pull request

There is a requirement to replace the current vector similarity search content, Search and query > Search > Vector similarity, with content more tutorial in nature. This PR replaces the existing content with tutorial-style content written by Brian Sam-Bodden. The current content is being moved to Search and query > Advanced concepts > Vectors

Which issues this PR fixes

1. DOC-2544

Main objects this PR modified

1. docs/docs/search/vectors.md

Mark if applicable

• This PR introduces API changes
• This PR introduces serialization changes

[dwdougherty]

This merge can't happen until my code example is merged into redis-py. See redis/redis-py#2886 .

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -0.59% ⚠️

Comparison is base (8ee53da) 82.80% compared to head (d94adfa) 82.21%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3760      +/-   ##
==========================================
- Coverage   82.80%   82.21%   -0.59%     
==========================================
  Files         192      191       -1     
  Lines       32540    32410     -130     
==========================================
- Hits        26944    26647     -297     
- Misses       5596     5763     +167     

see 14 files with indirect coverage changes

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

[dwdougherty]

The code example has been merged, so this PR can now be merged as well. @adrianoamaral: would you please merge this?