Optimize images in documentation folders for reduced repo size (#1067)

*Description:**

This PR optimizes images across several documentation folders.  
**Summary of results:**

- `terraform-cdk`: 98 images, ~65% space saved
- `terraform-docs-agents`: 87 images, ~69% space saved
- `terraform-docs-common`: 152 images, ~68% space saved
- `terraform-migrate`: processed, no changes
- `terraform-plugin-framework`: 225 images, ~74% space saved
- `terraform-plugin-log`: processed, no changes
- `terraform-plugin-mux`: processed, no changes
- `terraform-plugin-sdk`: processed, no changes
- `terraform-plugin-testing`: processed, no changes
- `well-architected-framework`: 63 images, ~38% space saved



*Images were skipped if compression would increase file size.*

Author: Younique98