Update heuristics for ROS Interface (#7602)

Author: jtbandes

lib/linguist/heuristics.yml

@@ -57,7 +57,7 @@ disambiguations:
   rules:
   - language: ROS Interface
     and:
-      - pattern: '^[a-z][a-z0-9_]*(?:\/[a-zA-Z]\w*)?(?:<=\d+)?(?:\[(?:<=\d+)?\])?\s+\w+\b'
+      - pattern: '(?i)^[a-z]\w*(?:\/[a-z]\w*)?(?:<=\d+)?(?:\[(?:<=\d+)?\])?\s+\w+\b'
       - pattern: '^---\s*$'
       - negative_pattern: '^\s*[^\s@#\w-]'
 - extensions: ['.al']
@@ -539,7 +539,7 @@ disambiguations:
     pattern: '^cplusplus\(?[\S]*\)?[\s]*\{?\{?|^namespace[\s]+([^.\s]*\.)*[^.\s]*;|^struct[\s]+[\S]+|^message[\s]+[\S]+(extends )?[\S]*[\s]*|^packet[\s]+[\S]+|^class[\s]+[\S]+(extends )?[\S]*[\s]*|^enum[\s]+[\S]+|^import ([^.\s]*\.)*[^.\s]*;'
   - language: ROS Interface
     and:
-      - pattern: '^[a-z][a-z0-9_]*(?:\/[a-zA-Z]\w*)?(?:<=\d+)?(?:\[(?:<=\d+)?\])?\s+\w+\b'
+      - pattern: '(?i)^[a-z]\w*(?:\/[a-z]\w*)?(?:<=\d+)?(?:\[(?:<=\d+)?\])?\s+\w+\b'
       - negative_pattern: '^\s*[^\s@#\w-]'
 - extensions: ['.n']
   rules:
@@ -805,7 +805,7 @@ disambiguations:
   rules:
   - language: ROS Interface
     and:
-      - pattern: '^[a-z][a-z0-9_]*(?:\/[a-zA-Z]\w*)?(?:<=\d+)?(?:\[(?:<=\d+)?\])?\s+\w+\b'
+      - pattern: '(?i)^[a-z]\w*(?:\/[a-z]\w*)?(?:<=\d+)?(?:\[(?:<=\d+)?\])?\s+\w+\b'
       - pattern: '^---\s*$'
       - negative_pattern: '^\s*[^\s@#\w-]'
 - extensions: ['.st']

samples/ROS Interface/ParameterEventDescriptors.msg

@@ -0,0 +1,9 @@
+# From https://github.com/ros2/rcl_interfaces/blob/1bd7d0b36c79e9e6db6980301f3732fff51ddc50/rcl_interfaces/msg/ParameterEventDescriptors.msg
+
+# This message contains descriptors of a parameter event.
+# It was an atomic update.
+# A specific parameter name can only be in one of the three sets.
+
+ParameterDescriptor[] new_parameters
+ParameterDescriptor[] changed_parameters
+ParameterDescriptor[] deleted_parameters