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/top_n_microorganisms.R

@@ -62,7 +62,7 @@ top_n_microorganisms <- function(x, n, property = "species", n_for_each = NULL,
   meet_criteria(col_mo, allow_class = "character", has_length = 1, allow_NULL = TRUE, is_in = colnames(x))
   if (is.null(col_mo)) {
     col_mo <- search_type_in_df(x = x, type = "mo", info = TRUE)
-    stop_if(is.null(col_mo), "`col_mo` must be set")
+    stop_if(is.null(col_mo), "{.arg col_mo} must be set")
   }
 
   x.bak <- x