[CLI]Develop CLI options for running and creating password protected PDFs

[nirmalchandra]

AC1:

passifypdf --help

or 

passifypdf -h 

(Should display various CLi option)

AC2:

passifypdf -input <source_PDF_file1> -passwd pass111 -output <target_PDF_file1>

- Should take a non-encrypted PDF and converts into password protected PDF and save as "target_PDF_file1" 
- Reads the source-file from `current` folder and writes the target-file to the `current` folder.

AC3:

passifypdf -input </any/source/path/source_PDF_file1> -passwd pass111 -output </any/target/path/target_PDF_file1>

- Same as AC2, but pick from a desired source path and writes to a desired target path

[xaviermontane]

Hello @nirmalchandra 👋, could you please assign this issue to me? I'm thinking of utilizing argparse.

[nirmalchandra]

Hello @nirmalchandra 👋, could you please assign this issue to me? I'm thinking of utilizing argparse.

done @xaviermontane . Thanks for your interest 👍