Support large pcd

[at-wat]

• Fix large map (>30M points) rendering on Firefox
• Reduce number of points to render while moving the viewpoint

[codecov]

Codecov Report

Attention: Patch coverage is 5.88235% with 16 lines in your changes missing coverage. Please review.

Project coverage is 38.16%. Comparing base (10d9969) to head (295c32a).

Files with missing lines	Patch %	Lines
command.go	11.11%	8 Missing ⚠️
console.go	0.00%	8 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #259      +/-   ##
==========================================
- Coverage   39.39%   38.16%   -1.24%     
==========================================
  Files           8        8              
  Lines        1396     1643     +247     
==========================================
+ Hits          550      627      +77     
- Misses        810      980     +170     
  Partials       36       36              

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[f-fl0]

LGTM