Update indic_num_map.py

[TejMakode1523]

Extended the dictionary to include numeral mappings for additional Indian languages and scripts.

• Added mappings for Assamese, Kashmiri (Arabic and Devanagari), Punjabi, Bodo, Dogri, Konkani, Maithili, Malayalam, Manipuri (Bengali and Meitei), Marathi, Nepali, Sanskrit, Santali, Sindhi (Arabic and Devanagari), Tamil, Telugu, and Urdu.
• Ensured comprehensive coverage for all listed languages.
• Provided a function to normalize Indic numerals to Roman numerals using the updated dictionary.