change project structure to remove namespaces

src/bitarray/types.ts

@@ -0,0 +1,26 @@
+export interface BitArray extends Iterable<boolean> {
+  readonly length: number;
+
+  isFull(): boolean;
+  isEmpty(): boolean;
+
+  get(index: number): boolean;
+  set(index: number, value: boolean): void;
+  fill(value: boolean): void;
+
+  and(other: BitArray): BitArray;
+  or(other: BitArray): BitArray;
+  xor(other: BitArray): BitArray;
+  not(): BitArray;
+
+  contains(other: BitArray): boolean;
+  intersects(other: BitArray): boolean;
+
+  slice(offset: number, length: number): BitArray;
+  copy(): BitArray;
+  toArray(): boolean[];
+
+  equals(other: BitArray): boolean;
+
+  toString(): string;
+}