doc: Expand optimset, optimget docstrings on parameter matching (bug #64525) * optimget.m,optimset.m: Add docstrings explanations of pattern matching, standard parameter lists, warnings on unknown parameters, and errors on ambiguities. Describe effects of adding unknown parameters and limitations of functions querying ambiguously named parameters. Add warning about actions that could cause unpredictable behavior. Adjust docstring variable names to be consistent betweeen both functions.

root = true

[*]
charset = utf-8
end_of_line = lf
indent_size = 2
indent_style = space
insert_final_newline = true

[*.{am,mk}]
indent_size = tab
indent_style = tab