Prepare for release

[cboulay]

• Normalize filter coefficients and add unit test by @cboulay in Normalize filter coefficients and add unit test #96
• Gaussian Smoothing Filter (redo of Gaussian Smoothing Filter - ezmsg-sigproc tool #95) by @cboulay in Gaussian Smoothing Filter (redo of #95) #97
• Replace util.sparse sliding_win_oneaxis with a much faster version by @cboulay in Replace util.sparse sliding_win_oneaxis with a much faster version #99
• Add Python 3.13 to test suite and cleanup GHA scripts slightly by @cboulay in Add Python 3.13 to test suite and cleanup GHA scripts slightly #100
• 75 hybrid time series buffer by @cboulay in 75 hybrid time series buffer #103
• Add docs by @cboulay in Add docs #108
• Feature: FIR filter design modules by @griffinmilsap in Feature: FIR filter design modules #105
• Feature: Filterbank design by @griffinmilsap in Feature: Filterbank design #106
• Feature: Filterbank Canonical Correlation Analysis (FBCCA) by @griffinmilsap in Feature: Filterbank Canonical Correlation Analysis (FBCCA) #107