Add theme: Cupertino

[aaaaalexis]

I am submitting a new Community Theme

Repo URL

Link to my theme: https://github.com/aaaaalexis/obsidian-cupertino

Theme checklist

• My repo contains all required files (please do not add them to this obsidian-releases repo).
  • manifest.json
  • theme.css
  • The screenshot file (16:9 aspect ratio, recommended size is 512px by 288px for fast loading).
• I have indicated which modes (dark, light, or both) are compatible with my theme.
• I have read the developer policies at https://docs.obsidian.md/Developer+policies, and have assessed my theme's adherence to these policies.
• I have read the tips in https://docs.obsidian.md/Themes/App+themes/Theme+guidelines and have self-reviewed my theme to avoid these common pitfalls.
• I have added a license in the LICENSE file.
• My project respects and is compatible with the original license of any code from other themes that I'm using. I have given proper attribution to these other themes in my README.md.

[github-actions]

Hello!

I found the following issues in your theme submission

Errors:

❌ Your theme screenshot is too big, we generally recommend a size around 512 × 288 pixels.
Detected size: 1920 x 1080 pixels
❌ Your latest Release is missing the theme.css file.
❌ Your latest Release is missing the manifest.json file.

---

^{This check was done automatically. Do NOT open a new PR for re-validation. Instead, to trigger this check again, make a change to your PR and wait a few minutes, or close and re-open it.}

[github-actions]

Hello!

I found the following issues in your theme submission

Errors:

❌ Your theme screenshot is too big, we generally recommend a size around 512 × 288 pixels.
Detected size: 1920 x 1080 pixels

---

^{This check was done automatically. Do NOT open a new PR for re-validation. Instead, to trigger this check again, make a change to your PR and wait a few minutes, or close and re-open it.}

[github-actions]

Hello!

I found the following issues in your theme submission

Errors:

❌ Your theme screenshot is too big, we generally recommend a size around 512 × 288 pixels.
Detected size: 1024 x 576 pixels

---

^{This check was done automatically. Do NOT open a new PR for re-validation. Instead, to trigger this check again, make a change to your PR and wait a few minutes, or close and re-open it.}