Directory and Symlink Colors Are Identical in Mocha-Blue

I noticed that in the **Mocha-Blue** variant, the directory color and the symlink color are identical. This makes it difficult to distinguish between them, especially when not using detailed `eza` output.

### Suggested Fix

Consider changing the symlink color from `#89b4fa` to `#89dceb`, which matches the `symlink_path` color and improves visual distinction.

### Additional Notes

- I only checked the **Mocha** theme.
- The issue appears to be specific to the **Mocha-Blue** variant.
- Other variants in Mocha do not seem to have this problem.

Start by locating the Mocha-Blue theme color definitions and compare the directory, symlink, and symlink_path colors. Change the symlink color as suggested, then verify that directory and symlink entries are visibly distinct while the other Mocha variants remain unchanged.

Written by the indexing model from the issue text.