ci: add codspeed benchmarks

[tlambert03]

addresses #75, but maybe doesn't close it

[codecov]

Codecov Report

Merging #152 (03a2ce0) into main (757767b) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #152   +/-   ##
=======================================
  Coverage   93.18%   93.18%           
=======================================
  Files          15       15           
  Lines        2229     2229           
=======================================
  Hits         2077     2077           
  Misses        152      152           

Impacted Files	Coverage Δ
src/nd2/nd2file.py	95.52% <ø> (ø)

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[codspeed-hq]

CodSpeed Performance Report

Merging #152 codspeed (03a2ce0) will create unknown performance changes.

Congrats! CodSpeed is installed 🎉

🆕 13 new benchmarks were detected.

You will start to see performance impacts in the reports once the benchmarks are run from your default branch.

Detected benchmarks

• test_time_imread[jonas_control002] (202.8 ms)
• test_time_imread[dims_p2z5t3-2c4y32x32] (180.6 ms)
• test_time_imread[train_TR67_Inj7_fr50] (125.4 ms)
• test_time_imread[karl_sample_image] (1.5 s)
• test_time_imread_dask[jonas_control002] (1.6 s)
• test_time_imread_dask[dims_p2z5t3-2c4y32x32] (300.2 ms)
• test_time_imread_dask[train_TR67_Inj7_fr50] (577.4 ms)
• test_time_imread_dask[karl_sample_image] (2.1 s)
• test_time_all_metadata[jonas_control002] (32.8 ms)
• test_time_all_metadata[dims_p2z5t3-2c4y32x32] (201.8 ms)
• test_time_all_metadata[train_TR67_Inj7_fr50] (209.5 ms)
• test_time_all_metadata[karl_sample_image] (353.3 ms)
• test_time_all_metadata[aryeh_but3_cont200-1] (95.8 ms)