Add helper to handle common error on exe name (#206)

To make @EmilieEPLoire's lfe easier 😉 

Use case:

```yaml
[...]
settings:
  QGIS_EXE_PATH:
    linux: /usr/bin/qgis
    mac: /usr/bin/qgis
    windows: "%PROGRAMFILES%/QGIS/3_22/bin/qgis-bin.exe"
[...]
```

Common error on executable name which is `/qgis-ltr-bin.exe` when LTR
version is installed. This PR adds an helper to check if
`qgis-ltr-bin.exe` exists when `qgis-bin.exe` is set. And vice-versa.

qgis_deployment_toolbelt/profiles/shortcuts.py

@@ -45,9 +45,12 @@
 # logs
 logger = logging.getLogger(__name__)
 
+
 # #############################################################################
 # ########## Classes ###############
 # ##################################
+
+
 class ApplicationShortcut:
     def __init__(
         self,
@@ -87,7 +90,32 @@ def __init__(
         if isinstance(exec_path, (str, Path)):
             self.exec_path = Path(exec_path)
             if not self.exec_path.exists():
-                logger.warning(f"Executable does not exist: {self.exec_path}")
+                # helper to handle common typo error on executable name on Windows
+                if (
+                    self.exec_path.name.endswith("qgis-bin.exe")
+                    and self.exec_path.with_name("qgis-ltr-bin.exe").exists()
+                ):
+                    logger.warning(
+                        f"Executable set does not exist: {self.exec_path} "
+                        f"but {self.exec_path.with_name('qgis-ltr-bin.exe')} does, so "
+                        "this one will be used instead. Check and fix your scenario."
+                    )
+                    self.exec_path = self.exec_path.with_name("qgis-ltr-bin.exe")
+                elif (
+                    self.exec_path.name.endswith("qgis-ltr-bin.exe")
+                    and self.exec_path.with_name("qgis-bin.exe").exists()
+                ):
+                    logger.warning(
+                        f"Executable set does not exist: {self.exec_path} "
+                        f"but {self.exec_path.with_name('qgis-bin.exe')} does, so "
+                        "this one will be used instead. Check and fix your scenario."
+                    )
+                    self.exec_path = self.exec_path.with_name("qgis-bin.exe")
+                else:
+                    logger.warning(
+                        f"Executable does not exist: {self.exec_path}. "
+                        "Shortcuts might not work. Check and fix your scenario."
+                    )
         else:
             raise TypeError(
                 f"exec_path must be a string or pathlib.Path, not {type(exec_path)}"