use newer syntax

[IndrajeetPatil]

No description provided.

[Copilot]

Pull request overview

This PR modernizes R syntax throughout the codebase by adopting newer language features introduced in R 4.1.0+ and contemporary dplyr patterns.

Key Changes:

• Replaced function(x) with anonymous function shorthand \(x) syntax
• Modernized dplyr code from group_by() %>% tally() %>% ungroup() to summarise(.by = ...) pattern
• Replaced isFALSE() with ! operator for logical negation
• Changed ifelse() to if-else for scalar conditional assignments
• Updated GitHub Actions workflow for code coverage with better configuration

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
R/utils.R	Updated error handler to use anonymous function shorthand \(e)
R/ggpiestats.R	Changed isFALSE(paired) to !paired in condition
R/ggpiestats-ggbarstats-helpers.R	Modernized .cat_counter to use .by parameter; updated .chisq_test_safe with new syntax and parameter handling
R/gghistostats.R	Updated labels parameter to use anonymous function shorthand
R/ggbetweenstats-helpers.R	Changed .f_switch from vectorized ifelse() to scalar if-else
R/ggbarstats.R	Changed isFALSE(paired) to !paired in condition
R/extract-stats.R	Converted multiple function definitions to anonymous function shorthand
.github/workflows/test-coverage.yaml	Enhanced workflow with explicit permissions, updated runner, improved coverage reporting, and artifact upload

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