Added Pushbullet Adapter

[Sumitmaithani]

What does this PR do?

Adds a new Push Adapter for sending push notification via Pushbullet.

Test Plan

• SignIn and Create a new Application on Pushbullet
• Add the following environment variables
• PUSHBULLET_API_KEY: < API_KEY >
• Run test against tests/e2e/Push/PushBulletTest.php

Related PRs and Issues

Closes #6397

Have you read the Contributing Guidelines on issues?

Yes

[stnguyen90]

Great PR! 🤯 We left some comments during the review, please check them out.

Please also make sure to:

1. to run the formatter to fix the lint errors
2. attach a screenshot of successful tests

[gewenyu99]

@Sumitmaithani remember to re-request review next time!

[stnguyen90]

Some more renames.

Please also attach a screenshot of successful tests.

[stnguyen90]

One more rename.

Please also attach a screenshot of successful tests.

[tessamero]

Hi @Sumitmaithani ,

Thank you for your contribution to Hacktoberfest 2023! We've noticed that your PR is still pending and requires some updates based on our engineering team's feedback.

We would love to see your PR successfully merged and send you the Appwrite swag as a token of appreciation. To remain eligible for the swag, please address the pending suggestions and/or ensure the tests pass by Friday, November 17th. If the PR isn't updated by then, we will unfortunately have to close it due to the end of the Hacktoberfest event.

Looking forward to your updates and thank you!

[gewenyu99]

Hey there! There were a lot of big PRs during this Hacktoberfest, and we wanted to give everyone ample time to collaborate with our engineering team. If you were able to merge your PRs during October, amazing. If it’s still not merged, don’t worry about it either. Either way, we’ve got your Hacktoberfest swag minted and ready to ship.

Please comment with your Discord username here so we can contact you about your shipping information to deliver your Hacktoberfest swag.

[Sumitmaithani]

@gewenyu99 sumitmaithani my discord username. Thanks

[gewenyu99]

Will reach out soon! Thanks for your patience, putting together a form for you.