Compute projected correlation with weights

[camposandro]

Adds a unit test that computes the projected auto-correlation counts with weighted catalogs. Closes #22.

• [X] My PR includes a link to the issue that I am addressing

Code Quality

• [X] I have read the Contribution Guide
• [X] My code follows the code style of this project
• [X] My code builds (or compiles) cleanly without any errors or warnings
• [X] My code contains relevant comments and necessary documentation

[github-actions[bot]]

Before [818ee316]	After [73f9cd43]	Ratio	Benchmark (Parameter)
2.72±0.6s	2.13±0.5s	~0.78	benchmarks.time_computation
1.66k	2.62k	1.58	benchmarks.mem_list

Click here to view all benchmarks.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

see 1 file with indirect coverage changes