Adds .irbrc to language config (#101)

IRB configurations files where not registered as Ruby 
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src="https://github.com/user-attachments/assets/4408483c-f108-4564-bf8a-e53be94c781e"
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This PR registers it
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src="https://github.com/user-attachments/assets/2f414819-91a9-4c25-a49c-07dea51ed485"
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Author: Otterpocket

languages/ruby/config.toml

@@ -17,6 +17,7 @@ path_suffixes = [
     "builder",
     "gemspec",
     "thor",
+    "irbrc",
     "pryrc",
     "simplecov",
     "Steepfile",