tikatuwq 0.4.6

• DESCRIPTION rewritten to English-only to avoid CRAN “Possibly misspelled words” NOTE.

• Fix DESCRIPTION URLs per CRAN (Lamparelli 2004, CONAMA 357/2005).

• Spell-check workflow: updated inst/WORDLIST (Portuguese terms & acronyms).

• Expanded all acronyms in DESCRIPTION (WQI ↔︎ IQA, TSI ↔︎ IET, CONAMA, NSF).

• Added references with <doi:…> and <https:…> in DESCRIPTION.

• Documented sections via @return for all exported functions:

  • conama_limits(): tibble/data frame of thresholds.
  • iqa(): tibble with IQA scores and qualitative class.
  • plot_box(), plot_heatmap(), plot_iqa(), plot_series(): ggplot objects.

• Kept LICENSE as plain MIT text (per CRAN policy).

• Minor internal refactor: conama_limits() now accepts class argument for filtering.

• Bumped version to 0.4.4 for CRAN resubmission.