docs!: add deprecated warnings for qrules/ampform

[redeboer]

Closes #1 Closes #369 Closes #553

[codecov[bot]]

Codecov Report

Merging #558 (6b97749) into main (a56dae3) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #558   +/-   ##
=======================================
  Coverage   86.26%   86.26%           
=======================================
  Files          23       23           
  Lines        3634     3634           
  Branches      884      884           
=======================================
  Hits         3135     3135           
  Misses        321      321           
  Partials      178      178           

Flag	Coverage Δ
unittests	86.26% <ø> (ø)

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