docs: 3d mesh search tutorial

[winstonww]

Adding 3D mesh tutorial to docs.

[github-actions]

Latency summary

Current PR yields:

• 🐢🐢 index QPS at 1228, delta to last 2 avg.: -9%
• 🐢🐢 query QPS at 56, delta to last 2 avg.: -12%
• 🐢🐢 dam extend QPS at 43277, delta to last 2 avg.: -17%
• 🐢🐢 avg flow time within 1.35 seconds, delta to last 2 avg.: -5%
• 😶 import jina within 0.426 seconds, delta to last 2 avg.: +4%

Breakdown

Version	Index QPS	Query QPS	DAM Extend QPS	Avg Flow Time (s)	Import Time (s)
current	1228	56	43277	1.35	0.426
2.2.2	1457	68	55688	1.3273	0.3983
2.2.1	1262	59	48875	1.5217	0.4167

Backed by latency-tracking. Further commits will update this comment.

[codecov]

Codecov Report

Merging #3829 (a042987) into master (898d157) will increase coverage by 1.45%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #3829      +/-   ##
==========================================
+ Coverage   88.54%   89.99%   +1.45%     
==========================================
  Files         156      156              
  Lines       12104    12224     +120     
==========================================
+ Hits        10717    11001     +284     
+ Misses       1387     1223     -164     

Flag	Coverage Δ
daemon	44.28% <ø> (-0.16%)	⬇️
jina	88.44% <ø> (-0.01%)	⬇️

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

Impacted Files	Coverage Δ
jina/executors/decorators.py	94.54% <0.00%> (-5.46%)	⬇️
jina/types/document/generators.py	89.09% <0.00%> (-3.57%)	⬇️
jina/peapods/runtimes/jinad/__init__.py	83.47% <0.00%> (-1.61%)	⬇️
jina/executors/__init__.py	82.69% <0.00%> (-0.97%)	⬇️
jina/jaml/__init__.py	95.47% <0.00%> (-0.04%)	⬇️
jina/types/arrays/traversable.py	90.76% <0.00%> (ø)
jina/peapods/pods/__init__.py	85.58% <0.00%> (+0.32%)	⬆️
jina/__init__.py	71.60% <0.00%> (+0.35%)	⬆️
jina/types/arrays/neural_ops.py	89.47% <0.00%> (+0.58%)	⬆️
jina/peapods/zmq/__init__.py	90.46% <0.00%> (+1.39%)	⬆️
... and 8 more

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[github-actions]

📝 Docs are deployed on https://docs-3d-mesh-tutorial--jina-docs.netlify.app 🎉