With screenshot add automatic perceptual hash calculation and screenshots clustering

[Mzack9999]

Please describe your feature request:

When the screenshot functionality is used, the tool should also calculate the screenshot's perceptual hash (e.g. https://github.com/corona10/goimagehash).
Optional: a summary clustering report should be produced as a final step. We can use a simple sequential clustering approach based on differential analysis with the following steps:

• For each screenshot
  • Calculate the perceptual hash
  • Compare the hash with the base perceptual hash of previous clusters if any
  • If the similarity is behind a certain threshold, add the screenshot to the cluster
  • Otherwise, create a new cluster

Describe the use case of this feature:

Experimental introduction of visual recon in httpx

### Tasks
- [ ] https://github.com/projectdiscovery/httpx/issues/1363
- [ ] https://github.com/projectdiscovery/httpx/issues/1371