Add error message for error GHC-44432

Author: BinderDavid

message-index/messages/GHC-44432/example1/after/MissingBinding.hs

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+module MissingBinding where
+
+someBoolean :: Bool
+someBoolean = True

message-index/messages/GHC-44432/example1/before/MissingBinding.hs

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+module MissingBinding where
+
+someBoolean :: Bool

message-index/messages/GHC-44432/example1/index.md

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+---
+title: Type signature lacks an accompanying binding
+---
+
+If a toplevel type signature is given, then there also needs to be an accompanying binding.
+
+In this example, a type signature was specified for `someBoolean`, but no binding was given.
+This error can be fixed by adding a binding which accompanies the type signature.
+
+## Error Message
+
+```
+MissingBinding.hs:3:1: error: [GHC-44432]
+    The type signature for ‘someBoolean’ lacks an accompanying binding
+  |
+3 | someBoolean :: Bool
+  | ^^^^^^^^^^^
+```

message-index/messages/GHC-44432/index.md

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+---
+title: Type signature lacks an accompanying binding
+summary: A type signature was provided, but no binding was given.
+severity: error
+introduced: 9.6.1
+---
+
+If a toplevel type signature is given, then there also needs to be an accompanying binding.