Introduce and encourage LSST Community forum.

[gitosaurus]

Closes #891 .

[review-notebook-app]

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[github-actions]

Before [36db3a5]	After [8211863]	Ratio	Benchmark (Parameter)
40.0±0.8ms	41.1±2ms	1.03	benchmarks.time_polygon_search
24.5±0.6ms	24.4±0.3ms	1	benchmarks.time_box_filter_on_partition
6.35±0s	6.34±0.01s	1	benchmarks.time_create_large_catalog
939±3ms	938±5ms	1	benchmarks.time_create_midsize_catalog
84.0±1ms	83.0±1ms	0.99	benchmarks.time_kdtree_crossmatch

Click here to view all benchmarks.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.21%. Comparing base (36db3a5) to head (99796de).
⚠️ Report is 151 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #900   +/-   ##
=======================================
  Coverage   95.21%   95.21%           
=======================================
  Files          54       54           
  Lines        2570     2570           
=======================================
  Hits         2447     2447           
  Misses        123      123           

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[nevencaplar]

Also add something about community into https://docs.lsdb.io/en/latest/tutorials/pre_executed/rubin_dp1.html, below:

You’ve accessed the data! You can see the schema of both catalogs. To learn how to use this data, see Using Rubin Data and follow the quickstart at Getting Started.
: