feat: add loading state to sign in, sign up, and reset password pages

[akash3444]

Description

Add loading state to sign in, sign up, and reset password pages.

Changes Made

Integrated loading state into sign in, sign up, and reset password pages Added spinner component Refactored button component to accept isLoading prop to show the spinner in the button

Screenshots

https://github.com/trypear/pear-landing-page/assets/64416825/1428053f-d73b-4dd4-9156-54138d8629a8

Checklist

• [ ] I have tagged the issue in this PR.
• [x] I have attached necessary screenshots.
• [x] I have provided a short description of the PR.
• [x] I ran yarn build and build is successful
• [x] My code follows the style guidelines of this project.
• [ ] I have added necessary documentation (if applicable)

[vercel[bot]]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Comments	Updated (UTC)
pear-landing-page	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jun 30, 2024 2:00am
pear-landing-page-main	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jun 30, 2024 2:00am

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