Utils: Introduce a FilePath::refersToExecutableFile

... to avoid the need in user code to care for .exe and .bat suffixes.

Change-Id: Ic249f14273f72c663912482555f98be1af923823
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: Marcus Tillmanns <marcus.tillmanns@qt.io>
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/libs/utils/filepath.h

@@ -179,6 +179,10 @@ public:
     [[nodiscard]] FilePath searchInPath(const FilePaths &additionalDirs = {},
                                         PathAmending = AppendToPath) const;
 
+    enum MatchScope { ExactMatchOnly, WithExeSuffix, WithBatSuffix,
+                      WithExeOrBatSuffix, WithAnySuffix };
+    bool refersToExecutableFile(MatchScope considerScript) const;
+
     // makes sure that capitalization of directories is canonical
     // on Windows and macOS. This is rarely needed.
     [[nodiscard]] FilePath normalizedPathName() const;