docs: push notifications setup & env guide#52

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soumya813 wants to merge 3 commits intosubh05sus:mainfrom

soumya813:feature/push-notifications-docs

Commits on Sep 4, 2025

docs: add push notifications setup, env examples, and PR template
soumya813
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feat(push): add web push implementation (client + server + SW + UI)
soumya813
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Commits on Sep 7, 2025

refactor: improve push notification initialization and settings handling
soumya813
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