Pre-evaluate inline expressions, add format_inline_(), fix print.ab

- All bare {variable}/{expression} in message_()/warning_()/stop_() calls
  are now pre-evaluated via paste0(), so users without cli/glue never see
  raw template syntax (mo_source.R, first_isolate.R, join_microorganisms.R,
  antibiogram.R, atc_online.R)
- Add format_inline_() helper: formats a cli-markup string and returns it
  (not emits it), using cli::format_inline() when available and cli_to_plain()
  otherwise
- Rewrite .onAttach to use format_inline_() for all packageStartupMessage
  calls; also adds {.topic} link and {.code} markup for option names
- print.ab: pre-evaluate function_name via paste0 (no .envir needed),
  apply highlight_code() to each example bullet for R syntax highlighting
- join_microorganisms: pre-evaluate {type} and {nrow(...)} expressions

https://claude.ai/code/session_01XHWLohiSTdZvCutwD7ag2b

R/mo_source.R

@@ -249,7 +249,7 @@ get_mo_source <- function(destination = getOption("AMR_mo_source", "~/mo_source.
     current_ext <- regexpr("\\.([[:alnum:]]+)$", destination)
     current_ext <- ifelse(current_ext > -1L, substring(destination, current_ext + 1L), "")
     vowel <- ifelse(current_ext %like% "^[AEFHILMNORSX]", "n", "")
-    stop_("The AMR mo source must be an RDS file, not a{vowel} {toupper(current_ext)} file. If \"{basename(destination)}\" was meant as your input file, use {.help [{.fun set_mo_source}](AMR::set_mo_source)} on this file. In any case, the option {.code AMR_mo_source} must be set to another path.")
+    stop_("The AMR mo source must be an RDS file, not a", vowel, " ", toupper(current_ext), " file. If \"", basename(destination), "\" was meant as your input file, use {.help [{.fun set_mo_source}](AMR::set_mo_source)} on this file. In any case, the option {.code AMR_mo_source} must be set to another path.")
   }
   if (is.null(AMR_env$mo_source)) {
     AMR_env$mo_source <- readRDS_AMR(path.expand(destination))