refactor: move TypedInt to a module

src/TypedInt.zig

@@ -0,0 +1,28 @@
+pub fn Tagged(T: type, tag: []const u8) type {
+    return enum(T) {
+        _,
+
+        pub const TAG = tag;
+
+        pub fn cborEncode(self: @This(), writer: *Writer) Writer.Error!void {
+            const value: T = @intFromEnum(self);
+            try cbor.writeValue(writer, .{ TAG, value });
+        }
+
+        pub fn cborExtract(self: *@This(), iter: *[]const u8) cbor.Error!bool {
+            var value: T = 0;
+            if (try cbor.matchValue(iter, .{ TAG, cbor.extract(&value) })) {
+                self.* = @enumFromInt(value);
+                return true;
+            }
+            return false;
+        }
+
+        pub fn format(self: @This(), writer: anytype) !void {
+            return writer.print("{s}:{d}", .{ TAG, @intFromEnum(self) });
+        }
+    };
+}
+
+const Writer = @import("std").Io.Writer;
+const cbor = @import("cbor");