Remove some functionality from the suffix array (#24)

* remove clean_taxa as it's not implemented correctly and needed + rename equate_il

* taxon requires only 32 bits

* remove LCA calculation from the suffix array + remove UMGAP dependency

* only search is needed

* remove functional processing (this should be part of the API)

* remove unused functionality + split searchers

* formatting

.rustfmt.toml

@@ -1,16 +1,15 @@
 unstable_features = true
 version = "Two"
 
-array_width = 90
-comment_width = 100
-imports_layout = "vertical"
-imports_granularity = "crate"
-fn_call_width = 90
-overflow_delimited_expr = false
-reorder_impl_items = true
+max_width = 120
+use_small_heuristics = "max"
+chain_width = 100
+struct_lit_width = 60
+struct_variant_width = 60
+imports_granularity = "Crate"
 group_imports = "StdExternalCrate"
-spaces_around_ranges = true
-struct_field_align_threshold = 20
-struct_lit_single_line = false
-trailing_comma = "never"
-wrap_comments = true
+normalize_comments = true
+normalize_doc_attributes = true
+overflow_delimited_expr = true
+trailing_comma = "Never"
+use_field_init_shorthand = true