♻️ refactor: Remove most circular dependencies.

The only one left is between Integer and _from_number. Ideally, Integer
will be written so that operations on single limbs are done more
efficiently than by converting the single limb to an integer first. This
would get rid of that last circular dependency.

Author: make-github-pseudonymous-again

src/Integer.js

@@ -1,4 +1,5 @@
-import {DEFAULT_DISPLAY_BASE, ZeroDivisionError} from './index.js';
+import {DEFAULT_DISPLAY_BASE} from './DEFAULT_DISPLAY_BASE.js';
+import {ZeroDivisionError} from './ZeroDivisionError.js';
 
 import {ValueError} from '@aureooms/js-error';
 

src/IntegerRing.js

@@ -1,7 +1,8 @@
-import {Integer, DEFAULT_DISPLAY_BASE} from './index.js';
-
 import {parse, convert} from '@aureooms/js-integer-big-endian';
 import {TypeError, ValueError} from '@aureooms/js-error';
+
+import {Integer} from './Integer.js';
+import {DEFAULT_DISPLAY_BASE} from './DEFAULT_DISPLAY_BASE.js';
 import {_from_number} from './_from_number.js';
 
 export class IntegerRing {

src/ZZ.js

@@ -1,3 +1,4 @@
-import {DEFAULT_REPRESENTATION_BASE, IntegerRing} from './index.js';
+import {DEFAULT_REPRESENTATION_BASE} from './DEFAULT_REPRESENTATION_BASE.js';
+import {IntegerRing} from './IntegerRing.js';
 
 export const ZZ = new IntegerRing('Integer Ring', DEFAULT_REPRESENTATION_BASE);

src/integer.js

@@ -1,4 +1,5 @@
-import {DEFAULT_DISPLAY_BASE, ZZ} from './index.js';
+import {DEFAULT_DISPLAY_BASE} from './DEFAULT_DISPLAY_BASE.js';
+import {ZZ} from './ZZ.js';
 
 export function $0() {
 	return ZZ.$0();