feat: CSS equivalent of grid-dark image

[35C4n0r]

Closes #418
/claim #418

[35C4n0r]

@tusharmath PR ready for review

[35C4n0r]

Currently the format:fix and format:check commands dosen't format the CSS files, lemme know if I should add that in this PR too.

[amitksingh1490]

I've noticed a few differences between the two implementations:

1. Grid Size: The grid size in the CSS version appears slightly different compared to the background image version.

2. Dot Visibility: The intersections of the horizontal and vertical lines in the CSS version have noticeable thick dots, which are not present in the image version.

3. Line Visibility: The lines in the CSS version are less visible compared to those in the image version.

Here is side by side comparison
Left has CSS
Right has bg image

[35C4n0r]

I've noticed a few differences between the two implementations:

1. Grid Size: The grid size in the CSS version appears slightly different compared to the background image version.
2. Dot Visibility: The intersections of the horizontal and vertical lines in the CSS version have noticeable thick dots, which are not present in the image version.
3. Line Visibility: The lines in the CSS version are less visible compared to those in the image version.

Here is side by side comparison Left has CSS Right has bg image

@amitksingh1490 I've tried to bring them as close as possible

[35C4n0r]