Update subdomain search syntax for crt.sh

Update Cloud OSINT methodology diagram formatting

Fix mermaid graph formatting in README.md

Add link checker workflow to GitHub Actions

Create pull request template

Create issue template for reporting problems

Add resource suggestion issue template

Add files via upload

Create file

Add files via upload

Update README.md

Fix spelling of 'Medata' to 'Metadata'

Improve formatting of PublicWWW section in README

Fix formatting for IBM Cloud section in README

Enhance README with detailed Cloud OSINT information