release 6.0.0 (#1078)

Added details for release 6.0.0 including new, updated, and fixed
programs, as well as installation guide updates.

Update major version tag with $VERSION

Release 5.0.0 (#1065)

- [ ] Review if pyXmipp is incorporated in main (Changelog) -> Not for
this release
- [x] Review if CUDA 13 is incoporated in main (Changelog)
- [x] Decide the name of the Release 
- [x] CUDA variables from scipion.conf

Update major version tag with $VERSION

Fix dynamic tag name

Update major version tag with $VERSION

Merge pull request #1030 from I2PC/release-3.25.06

Update CHANGELOG.md

Updated libcifpp repo URL

Merge pull request #885 from I2PC/er_pca2dClass_merge_devel

pca 2dclassification

Merge pull request #843 from I2PC/release-3.23.11

Release-3.23.11 Nereus