Added saved playback episode state

[Mayureshd-18]

Closes: #123

• Title : Added functionality to save the playback episode state
• Name: Mayuresh
• Idenitfy yourself: GSSOC, SSOC

Describe the add-ons or changes you've made 📃

Added functionality that will open the same episode on reloading the website or after closing and opening the website on which the user was. Use of local storage to add this functionality and browser cache

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

Checklist: ☑️

• My code follows the Contributing Guidelines & Code of Conduct of this project.
• This PR does not contain plagiarized content.
• I have performed a self-review of my own code.
• I have commented my code, particularly wherever it was hard to understand.
• My changes generate no new warnings.

Screenshots 📷

Before closing:

After reopening the website:

Note to reviewers 📄

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Name	Status	Preview	Comments	Updated (UTC)
chanakya	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jun 16, 2024 5:46pm

[Avdhesh-Varshney]

@Mayureshd-18 update your code only but you have converted double quotes to single quotes.

[Mayureshd-18]

@Avdhesh-Varshney Done. Please review

Regards

[Avdhesh-Varshney]

@Mayureshd-18 PR Approved 🎉