perf(grammar): reorder pest grammar operations by usage frequency

Reorganized operation alternatives based on actual benchmark usage
patterns to optimize PEG parser performance. Most frequently used
operations (split, join, upper, lower, trim, substring, reverse) are now
tested first.

Author: claude

src/pipeline/template.pest

@@ -4,30 +4,31 @@ debug_flag = @{ "!" }
 
 operation_list = { operation ~ ("|" ~ operation)* }
 
+// Ordered by frequency based on benchmark usage patterns
 operation = {
     shorthand_range
   | shorthand_index
   | split
+  | join
   | upper
   | lower
   | trim
-  | append
-  | prepend
-  | surround
-  | quote
-  | join
   | substring
+  | reverse
   | replace
-  | map
   | filter
   | filter_not
-  | slice
   | sort
-  | reverse
   | unique
+  | map
+  | slice
+  | append
+  | prepend
+  | surround
+  | quote
+  | pad
   | regex_extract
   | strip_ansi
-  | pad
 }
 
 shorthand_index = { number }
@@ -76,27 +77,28 @@ pad_char       = @{ argument }
 // Map operation
 map_operation       = { "{" ~ map_operation_list ~ "}" }
 map_operation_list  = { map_inner_operation ~ ("|" ~ map_inner_operation)* }
+// Ordered by frequency for map operations
 map_inner_operation = {
-    strip_ansi
+    upper
+  | lower
+  | trim
   | substring
+  | reverse
   | replace
+  | map_split
+  | map_join
   | append
   | prepend
   | surround
   | quote
-  | upper
-  | lower
-  | trim
   | pad
-  | reverse
-  | map_split
-  | map_join
   | map_slice
   | map_sort
   | map_unique
   | map_filter
   | map_filter_not
   | map_regex_extract
+  | strip_ansi
 }
 
 // Map-specific operations that need special handling