feat: add interactive mode (-it) support for per-folder deletion confirmation and --help flag for the usage manual

[Tahsin005]

What's Changed

Added two new flags to both the Node.js and C versions of nmclean.

-it (Interactive Mode)

By default, nmclean runs autonomously and deletes all node_modules folders without any prompts. With -it, the tool pauses at each found folder and asks the user for confirmation before deleting.

Accepted inputs:

• Confirm -> y, Y, yes, YES, Yes — or just press Enter
• Skip -> n, N, no, NO, No

-h / --help

Prints a formatted usage manual to the terminal and exits. Covers all available flags, behavior, examples, and interactive prompt inputs.

How to Test

Auto mode (existing behavior, unchanged)

nmclean

Interactive mode

nmclean -it

Help manual

nmclean --help
nmclean -h

Changes

• index.js — added -it and --help/-h flag parsing and confirm() prompt helper
• nmclean.c — same flags implemented in C with confirm() using stdin and manual ANSI coloring
• README.md — updated with options table, per-flag sections with example outputs, and accepted input table for interactive mode