Infix to postfix conversion

[pushpit-J19]

Related Issue

• Info about the related issue

• DevIncept Participant

• Contributor

Closes: #62

Describe the changes you've made

Added the code for infix to postfix conversion using stack . Added readme files and the outputs with 3 examples.

Type of change

What sort of change have you made:

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Code style update (formatting, local variables)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Manually run and tested

Checklist:

• My code follows the guidelines of this project.
• I have performed a self-review of my own code.
• I have commented my code, particularly whereever it was hard to understand.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings.
• I have added test cases that prove my fix is effective or that my feature works.

[prathimacode-hub]

Impressive work. Great going. Wonderful inaguration to Stacks. 🎇🤩@pushpit-J19