docs(matplotlib): Add new entry for pyplot.figure()

[Shubham-Jain52]

Description

This PR adds a new Term Entry for matplotlib.pyplot.figure() under the Matplotlib > Pyplot concept.

• File Created: content/matplotlib/concepts/pyplot/terms/figure/figure.md
• Content: The new entry explains the purpose of plt.figure(), details its common syntax and parameters, and provides a runnable code example with an accompanying output image (figure_example.png, added to the root /media folder).
• Motivation: Addresses issue [Term Entry] Python matplotlib - pyplot: figure() #7813, which requested this new documentation page.

---

Issue Solved

Closes #7813

---

Type of Change

• Adding a new entry
• Editing an existing entry (fixing a typo, bug, issues, etc)
• Updating the documentation

---

Checklist

• All writings are my own.
• My entry follows the Codecademy Docs style guide.
• My changes generate no new warnings.
• I have performed a self-review of my own writing and code.
• I have checked my entry and corrected any misspellings.
• I have made corresponding changes to the documentation if needed. (Self-contained entry, likely no other doc changes needed)
• I have confirmed my changes are not being pushed from my forked main branch.
• I have confirmed that I'm pushing from a new branch named feat/7813-strip-method-clarification (or adjust if your branch name is different).
• I have linked any issues that are relevant to this PR in the Issues Solved section.

[CLAassistant]

All committers have signed the CLA.

[mamtawardhani]

Looks good for a second review! 🚀

[Radhika-okhade]

Made slight changes to the tags and syntax.
The entry looks good to be merged.

[github-actions]

👋 @Shubham-Jain52
You have contributed to Codecademy Docs, and we would like to know more about you and your experience.
Please take a minute to fill out this four question survey to help us better understand Docs contributions and how we can improve the experience for you and our learners.
Thank you for your help!

🎉 Your contribution(s) can be seen here:

https://www.codecademy.com/resources/docs/matplotlib/pyplot/figure

Please note it may take a little while for changes to become visible.
If you're appearing as anonymous and want to be credited, visit the linked accounts page and ensure that your GitHub account is linked.