Generalise interpretive rules for multi-guideline support (#268)

- Rename data-raw/eucast_rules.tsv → interpretive_rules.tsv; add rule.provider
  column (value: "EUCAST") to distinguish future CLSI rows
- Rename EUCAST_RULES_DF → INTERPRETIVE_RULES_DF in _pre_commit_checks.R;
  filter by rule.provider == guideline when applying rules in interpretive_rules()
- Rename custom_eucast_rules() → custom_interpretive_rules() with new S3 class
  "custom_interpretive_rules"; old function becomes a deprecated wrapper in
  zz_deprecated.R; backward-compat S3 dispatch shims added for old class
- Remove stop_if(guideline == "CLSI", ...) so clsi_rules() no longer errors
- Add .onLoad shim in zzz.R to create INTERPRETIVE_RULES_DF from EUCAST_RULES_DF
  for transitional compatibility until sysdata.rda is regenerated

https://claude.ai/code/session_01D46BTsfJSPo3HnLWp3PRkP

data-raw/_pre_commit_checks.R

@@ -42,9 +42,9 @@ pre_commit_lst <- list()
 
 usethis::ui_info(paste0("Updating internal package data"))
 
-# See 'data-raw/eucast_rules.tsv' for the EUCAST reference file
-pre_commit_lst$EUCAST_RULES_DF <- utils::read.delim(
-  file = "data-raw/eucast_rules.tsv",
+# See 'data-raw/interpretive_rules.tsv' for the interpretive rules reference file
+pre_commit_lst$INTERPRETIVE_RULES_DF <- utils::read.delim(
+  file = "data-raw/interpretive_rules.tsv",
   skip = 9,
   sep = "\t",
   stringsAsFactors = FALSE,
@@ -364,7 +364,7 @@ pre_commit_lst$MO_RELEVANT_GENERA <- c(
 )
 
 # antibiotic groups
-# (these will also be used for eucast_rules() and understanding data-raw/eucast_rules.tsv)
+# (these will also be used for interpretive_rules() and understanding data-raw/interpretive_rules.tsv)
 pre_commit_lst$AB_AMINOGLYCOSIDES <- antimicrobials %>%
   filter(group %like% "aminoglycoside|paromomycin|spectinomycin") %>%
   pull(ab)