CMB lensing likelihood data: Joint ACT, SPT-3G, and Planck analysis

Likelihood data for the joint CMB lensing analysis combining measurements from the Atacama Cosmology Telescope (ACT), the South Pole Telescope (SPT-3G), and Planck. This dataset contains binned lensing band powers, covariance matrices, binning matrices, N1 correction terms, normalization corrections, and associated metadata for the baseline joint likelihood. The combined lensing band powers achieve a signal-to-noise ratio of 61 and yield a 1.6% measurement of S8^CMBL = 0.825 +/- 0.015. Data accompanying arXiv:2504.20038.