Add a Digraphs section to nvim config

configs/programs/neovim.nix

@@ -53,6 +53,8 @@ let
 			","
 			(map (rt: "${rt}") rs)
 		);
+	mkDigraph = {keys, code}: "dig " + keys + " " + (toString code) + "\n";
+	mkDigraphs = dgs: (concatStringsSep "" (map mkDigraph dgs));
 	mkVimHeader = h: "\"\"\"\"\"\"\"\" ${h} \"\"\"\"\"\"\"\"\"";
 	mkVimSection = section:
 		(concatStringsSep "\n\n\n"
@@ -67,10 +69,11 @@ let
 			)
 		);
 	mkVimSections = sections: concatStringsSep "\n\n\n" (map mkVimSection sections);
-	mkConfig = { settings?{}, mappings?[], runtimes?[], extra?"" }:
+	mkConfig = { settings?{}, mappings?[], digraphs?[], runtimes?[], extra?"" }:
 		mkVimSections [
 			{"ADDITIONAL RUNTIME DIRS" = mkRuntimes runtimes;}
 			{"SETTINGS" = mkSettings settings;}
+			{"DIGRAPHS" = mkDigraphs digraphs;}
 			{"KEY BINGINGS" = mkMappings mappings;}
 			{"MANUAL SETTINGS" = extra;}
 		];
@@ -116,6 +119,40 @@ in
 			foldminlines = 10;
 			foldnestmax = 2;
 		};
+		digraphs = [
+			{ # Append
+				keys = "<>";
+				code = 8853;
+			}
+			{ # Multi Map
+				keys = "-o";
+				code = 8888;
+			}
+			{ # Degree Symbol
+				keys = "'o";
+				code = 176;
+			}
+			{ # Ring Operator
+				keys = ".o";
+				code = 8728;
+			}
+			{ # Integers
+				keys = "ZZ";
+				code = 8484;
+			}
+			{ # Naturals
+				keys = "NN";
+				code = 8469;
+			}
+			{ # Reals
+				keys = "RR";
+				code = 8477;
+			}
+			{ # Rationals
+				keys = "QQ";
+				code = 8474;
+			}
+		];
 		mappings = [
 			{
 				mode = "";