fix(validation): correct Lithuanian century digit mapping and improve test coverage

- Fix critical bug in Lithuanian Personal Code year calculation
  - Digit 3 now correctly maps to 1900s (was incorrectly 1800s)
  - Replace flawed mathematical formula with clear if-else logic
  - All century digits (1-8) now properly validated
- Add parseIdInfo support for Iceland, Lithuania, and Luxembourg
- Fix documentation discrepancy in package.json (103 → 80 countries)
- Add comprehensive test suite for 9 low-coverage countries (101 new tests)
  - HUN, ISL, LTU, LUX, ALB, COL, HKG, IRN, ISR
- Improve overall test coverage from 61.95% to 68.24%

Coverage improvements:
- HKG: 20.00% → 100.00% (+80.00%)
- COL: 20.68% → 89.65% (+68.97%)
- ISL: 15.38% → 82.05% (+66.67%)
- LTU: 15.38% → 81.35% (+65.97%)
- HUN: 13.04% → 76.08% (+63.04%)

BREAKING: None
Fixes data integrity issue where Lithuanian IDs returned incorrect birth years

Author: AngusHsu

package.json

@@ -1,7 +1,7 @@
 {
   "name": "idnumbers",
   "version": "1.0.0",
-  "description": "A TypeScript library for verifying and parsing national ID numbers - supports 103 countries across 6 continents including USA, UK, France, Germany, Japan, China, India, Brazil, and many more",
+  "description": "A TypeScript library for verifying and parsing national ID numbers - supports 80 countries across 6 continents including USA, UK, France, Germany, Japan, China, India, Brazil, and many more",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
   "scripts": {