feat: improve mytonctrl overview

[hacker-volodya]

Closes #1349

[github-actions]

To fix the formatting issues:

1. Install necessary dependencies: npm ci
2. Then, run this command:

npx remark -o --silent --silently-ignore ecosystem/node/mytonctrl/overview.mdx 

[github-actions]

Thanks for improving the MyTonCtrl docs—there’s one inline suggestion in ecosystem/node/mytonctrl/overview.mdx to align the installer section with the project style guide; please apply the inline suggestion.

[github-actions]

To fix the formatting issues:

1. Install necessary dependencies: npm ci
2. Then, run this command:

npx remark -o --silent --silently-ignore ecosystem/node/mytonctrl/overview.mdx