Add support for parsing .txt files

[AdityaManojShinde]

🚨 Problem

Currently, the application does not support parsing of .txt (plain text) files.

The system should be able to:

• Accept .txt files as valid input
• Read and parse their content correctly
• Process the extracted data similarly to other supported file formats

Current Behavior

• .txt files are not recognized as a supported format
• Parsing fails or is skipped entirely

Proposed Solution

• Implement a parser for .txt files
• Ensure encoding handling (UTF-8, ASCII, etc.)
• Integrate .txt parsing into the existing file processing pipeline