dtlg 0.1.0

New features

summary_table(), summary_table_by() and summary_table_by_targets() gain an inc_missing argument controlling how the “Missing” row is rendered for numeric targets: TRUE (default) always shows it, NA shows it only when missing values are present, and FALSE suppresses it. Plumbed through to calc_desc() and calc_stats().
summary_table_by() and summary_table_by_targets() gain a sep argument to set the separator between the heading and group labels when grouping by more than one variable in rows_by (defaults to ".").

calc_desc(): the n row now reports the count of non-missing values rather than the total row count (.N), so n and the Missing row are now consistent.
summary_table_by_targets(): removed the spurious “target needs to be length 2” message; multiple target variables are now properly supported and covered by tests.

Adopted lintr with default linters across the package and added a lint.yaml GitHub Actions workflow.
Added a code-coverage workflow that posts a coverage summary as a comment on pull requests, gated on pull_request events to avoid duplicate runs.
Expanded the test suite – new tests for AET01_table(), the rounding helpers, tern_summary_table(), and additional summary_table*() cases (multiple targets, missing-value handling) – raising overall coverage.

Reorganised maintainership and contact details: maintainer e-mails moved to the acuityanalytics.com domain and copyright holder updated to Acuity Analytics.
Documentation cleanup for dt_count(), dt_summarise() and the summary_table*() family; minor README and benchmarks article fixes.