[WIP] docs: Improve quickstart to include push features, batch scoring, odfv

[adchia]

What this PR does / why we need it:

Which issue(s) this PR fixes:

Fixes #

[codecov-commenter]

Codecov Report

Merging #3034 (87c43fe) into master (5b0cc87) will increase coverage by 8.86%. The diff coverage is 87.50%.

@@            Coverage Diff             @@
##           master    #3034      +/-   ##
==========================================
+ Coverage   66.93%   75.79%   +8.86%     
==========================================
  Files         173      207      +34     
  Lines       15056    17076    +2020     
==========================================
+ Hits        10077    12943    +2866     
+ Misses       4979     4133     -846     

Flag	Coverage Δ
integrationtests	66.94% <12.50%> (+0.01%)	:arrow_up:
unittests	58.26% <87.50%> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
sdk/python/feast/feature_store.py	85.47% <ø> (+3.61%)	:arrow_up:
sdk/python/feast/feature_view.py	96.66% <ø> (ø)
sdk/python/tests/doctest/test_all.py	90.00% <80.00%> (+74.74%)	:arrow_up:
sdk/python/feast/repo_operations.py	48.62% <100.00%> (+24.77%)	:arrow_up:
sdk/python/tests/unit/cli/test_cli_chdir.py	100.00% <100.00%> (+81.48%)	:arrow_up:
...k/python/tests/unit/local_feast_tests/test_init.py	100.00% <100.00%> (+81.08%)	:arrow_up:
.../python/feast/infra/feature_servers/base_config.py	100.00% <0.00%> (ø)
...n/feast/infra/feature_servers/aws_lambda/config.py	100.00% <0.00%> (ø)
...thon/feast/infra/utils/postgres/postgres_config.py	100.00% <0.00%> (ø)
...b/cassandra_online_store/cassandra_online_store.py	2.63% <0.00%> (ø)
... and 112 more

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[feast-ci-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: adchia, felixwang9817

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[felixwang9817]

/lgtm

[feast-ci-bot]

New changes are detected. LGTM label has been removed.