fix(#4967): parse leading ambiguous decimal symbol as a decimal

Addresses #6520 (comment)

Author: Michael Jordan

packages/@internationalized/number/src/NumberParser.ts

@@ -311,6 +311,7 @@ class NumberParserImpl {
           decimalPartMatches?.groups?.digits?.length < 3 ||
           decimalPartMatches?.groups?.digits?.length > 3 ||
           integerPart.length > 3 ||
+          (integerPart.length === 0 && decimalPartMatches?.groups?.digits?.length === 3) ||
           (integerPart === '0' || integerPart === '\u0660' || integerPart === '\u3007')
         )
       ) {

packages/@internationalized/number/test/NumberParser.test.js

@@ -343,7 +343,7 @@ describe('NumberParser', function () {
 
     it('should support group characters', function () {
       expect(new NumberParser('en-US', {style: 'decimal'}).isValidPartialNumber(',')).toBe(true); // en-US-u-nu-arab uses commas as the decimal point character
-      expect(new NumberParser('en-US', {style: 'decimal'}).isValidPartialNumber(',000')).toBe(false); // latin numerals cannot follow arab decimal point
+      expect(new NumberParser('en-US', {style: 'decimal'}).isValidPartialNumber(',000')).toBe(true); // latin numerals cannot follow arab decimal point, but parser will interpret a comma as a decimal point and interpret this as 0.
       expect(new NumberParser('en-US', {style: 'decimal'}).isValidPartialNumber('1,000')).toBe(true);
       expect(new NumberParser('en-US', {style: 'decimal'}).isValidPartialNumber('-1,000')).toBe(true);
       expect(new NumberParser('en-US', {style: 'decimal'}).isValidPartialNumber('1,000,000')).toBe(true);