Replace bare backticks with cli inline markup across all messaging calls

- {.arg} for argument names in stop_/warning_/message_ calls
- {.cls} after "of class" text in format_class() and elsewhere
- {.fun} for function names (replaces `fn()` pattern)
- {.pkg} for tidyverse package names (dplyr, ggplot2)
- {.code} for code literals (TRUE, FALSE, expressions)
- Rewrite print.ab: use cli named-vector with * bullets and code
  highlighting when cli >= 3.0.0; keep plain-text fallback otherwise
- Fix typo in as.sir(): "of must be" -> "or must be"
- switch sir.R verbose notes from message() to message_()

https://claude.ai/code/session_01XHWLohiSTdZvCutwD7ag2b

R/bug_drug_combinations.R

@@ -82,9 +82,9 @@ bug_drug_combinations <- function(x,
   # -- mo
   if (is.null(col_mo)) {
     col_mo <- search_type_in_df(x = x, type = "mo")
-    stop_if(is.null(col_mo), "`col_mo` must be set")
+    stop_if(is.null(col_mo), "{.arg col_mo} must be set")
   } else {
-    stop_ifnot(col_mo %in% colnames(x), "column '", col_mo, "' (`col_mo`) not found")
+    stop_ifnot(col_mo %in% colnames(x), "column '", col_mo, "' ({.arg col_mo}) not found")
   }
 
   x.bak <- x
@@ -226,7 +226,7 @@ format.bug_drug_combinations <- function(x,
   x.bak <- x
   if (inherits(x, "grouped")) {
     # bug_drug_combinations() has been run on groups, so de-group here
-    warning_("in `format()`: formatting the output of `bug_drug_combinations()` does not support grouped variables, they were ignored")
+    warning_("in {.fun format}: formatting the output of {.fun bug_drug_combinations} does not support grouped variables, they were ignored")
     x <- as.data.frame(x, stringsAsFactors = FALSE)
     idx <- split(seq_len(nrow(x)), paste0(x$mo, "%%", x$ab))
     x <- data.frame(