Prepare rcosmo 1.1.5 for CRAN resubmission

[frycast]

Prepare rcosmo 1.1.5 for resubmission following its removal when geoR was archived. geoR is available again; package functions and the inherited licence and test-runner behaviour are unchanged.

Changes:

• Set DESCRIPTION to version 1.1.5 and replace the 2022 CRAN comments with current check results.
• Remove the obsolete CRAN-SUBMISSION marker and newly committed ..Rcheck output.
• Move the development-only rhub command from tests/ into the already excluded dev/ directory.
• Run full --as-cran checks, including PDF/HTML manuals, with the required runner display, LaTeX and HTML tools.

Validation on 30 September 2026:

Environment	Full --as-cran result
Linux R-devel (2026-09-29 r90598)	0 errors, 0 warnings; incoming NOTE for archived status and ESA URLs returning HTTP 503
Linux R 4.6.1	Status: OK
Linux R 4.5.3	Status: OK
Windows R 4.6.1	Status: OK, including indexed PDF and HTML manual
macOS arm64 R 4.6.1	0 errors, 0 warnings; NOTE because system HTML Tidy is too old

Validated runs: R-devel, Linux and macOS, and Windows after the indexing fix. Both runs check identical package contents; their differences are confined to the excluded CI configuration. The final commit only updates cran-comments.md, which is excluded from the source package; its automatic repeat checks may still be running.

The tests/testthat.R runner remains commented out, as in the previously accepted package. These results establish the package checks and examples, not execution of the testthat suite. No broad test, licensing or API changes are included. CRAN submission and merge remain separate.