add comparison, logic, math process descriptions (#141)

reorganize comparison, math, and logic process descriptions

src/openeo_grass_gis_driver/actinia_processing/__init__.py

@@ -38,41 +38,11 @@
 # from . import zonal_statistics
 # from . import temporal_algebra_process
 
-# logical processes
-from . import logic_and_process
-from . import logic_if_process
-from . import logic_not_process
-from . import logic_or_process
-from . import logic_xor_process
+# comparison processes
+from . import comparison_processes
+
+# logic processes
+from . import logic_processes
 
 # math processes
-from . import math_abs_process
-from . import math_add_process
-from . import math_clip_process
-from . import math_divide_process
-from . import math_eq_process
-from . import math_exp_process
-from . import math_gt_process
-from . import math_int_process
-from . import math_isnan_process
-from . import math_isnodata_process
-from . import math_ln_process
-from . import math_lt_process
-from . import math_lte_process
-from . import math_max_process
-from . import math_mean_process
-from . import math_median_process
-from . import math_min_process
-from . import math_mod_process
-from . import math_multiply_process
-from . import math_neq_process
-from . import math_normdiff_process
-from . import math_power_process
-from . import math_product_process
-from . import math_quantiles_process
-from . import math_sd_process
-from . import math_sgn_process
-from . import math_sqrt_process
-from . import math_subtract_process
-from . import math_sum_process
-from . import math_variance_process
+from . import math_processes