fix: Ensure newly-added files show up as 'changed'

[rschristian]

Seeing this issue here where a newly-added file lands in the "unchanged" list when it shouldn't.

The file should only be unchanged if there's a delta of 0 AND the original size is not 0:

compressed-size-action/src/utils.js

Lines 82 to 83 in 98b0edc

	} else if (originalSize === 0) {
	deltaText += ` (new file)`;

[github-actions]

Size Change: 0 B

Total Size: 76 kB

ℹ️ View Unchanged

Filename	Size
index.js	76 kB

_{compressed-size-action}

[rschristian]

After further debugging I've realized this is actually a consequence of not having a proper clean script, though the ergonomics there aren't great at the moment. Will have a separate PR to improve slightly.