Update media workflow diagram in README

[ashutoshkhainar33-star]

Replaced text diagram of media workflow with an image.

FastPix Python SDK - Documentation PR

Documentation Changes

What Changed

• New documentation added
• Existing documentation updated
• Documentation errors fixed
• Code examples updated
• Links and references updated
• Other

Files Modified

• README.md
• docs/ files
• USAGE.md
• CONTRIBUTING.md
• Other: _______________

Summary

Brief description of changes:

<!-- What documentation was added, updated, or fixed? -->

Code Examples (if Applicable)

# If you added/updated code examples, include them here
from fastpix import FastpixSDK
from fastpix.models.components import Security

fastpix = FastpixSDK(
    security=Security(
        username="your-username",
        password="your-password"
    )
)

Testing

• All code examples tested
• Links verified
• Grammar checked
• Formatting consistent

Review Checklist

• Content is accurate
• Code examples work
• Links are working
• Grammar is correct
• Formatting is consistent

---

Ready for review!

[Rajakavitha1]

@ashutoshkhainar33-star Please provide the links to the respective sections for the steps that are outlined at the beginning of readme.