Improve missing-value errors for numeric comparisons

[selkamand]

Motivation

• Numeric comparison assertions previously surfaced less-clear errors when inputs contained NA/NaN; this change makes those failures report a dedicated "no missing values" message.
• Add regression coverage so comparisons that receive NaN/NA produce the expected missing-value errors.

Description

• Insert assert_no_missing into numeric comparison assertion chains (e.g. assert_all_greater_than, assert_all_greater_than_or_equal_to, assert_all_less_than, assert_all_less_than_or_equal_to, assert_all_between, assert_between, and related wrappers) in R/assert_compare.R so comparisons fail fast with a missing-values error.
• Add @include has.R to R/assert_compare.R and @include assert_create.R to R/has.R to ensure symbols are available during documentation loading.
• Add a new test block to tests/testthat/test-assert_compare.R checking that NaN (and vectors containing NaN) trigger the new missing-values error messages, and update the corresponding snapshot tests/testthat/_snaps/assert_compare.md.
• Update NEWS.md and DESCRIPTION Collate ordering to reflect the changes.

Testing

• Ran Rscript -e "devtools::document()" and documentation built successfully after adjusting includes.
• Ran Rscript -e "devtools::test()" and all tests passed after accepting the updated snapshot via testthat::snapshot_accept('assert_compare').
• Ran Rscript -e "devtools::check()" which completed but reported 1 WARNING and 1 NOTE (missing qpdf for PDF checks and "unable to verify current time"); there were no errors but R CMD check returned with warnings/notes.

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