chore: add a script to create symbolic links to the appropriate Samples in test projects (#408)

* add script
* fix script

Author: sindharta

Scripts/create_samples_symbolic_link.bat

@@ -0,0 +1,59 @@
+@echo off
+setlocal enabledelayedexpansion
+
+:: Base paths for symbolic links based on folder names
+set hdrp_target=..\..\..\com.unity.toonshader\Samples~\HDRP
+set urp_target=..\..\..\com.unity.toonshader\Samples~\URP
+set builtin_target=..\..\..\com.unity.toonshader\Samples~\Legacy
+
+set hdrp_sample_symlink_name=SamplesHDRP
+set urp_sample_symlink_name=SamplesURP
+set builtin_sample_symlink_name=SamplesBuiltIn
+
+:: Directory to operate on
+set test_projects_dir=TestProjects
+
+:: Loop through all folders in the TestProjects directory
+for /d %%F in ("%test_projects_dir%\*") do (
+    :: Extract only the folder name (without the path)
+    set folder_name=%%~nF
+
+    :: Check if the folder name contains "HDRP", "Universal", or "Legacy"
+    set target_path=
+	set symlink_name=
+    echo !folder_name! | findstr /i "HDRP" >nul
+    if !errorlevel! equ 0 (
+        set target_path=%hdrp_target%
+        set symlink_name=%hdrp_sample_symlink_name%
+    ) else (
+        echo !folder_name! | findstr /i "Universal" >nul
+        if !errorlevel! equ 0 (
+            set target_path=%urp_target%
+            set symlink_name=%urp_sample_symlink_name%
+        ) else (
+            echo !folder_name! | findstr /i "Legacy" >nul
+            if !errorlevel! equ 0 (
+                set target_path=%builtin_target%
+                set symlink_name=%builtin_sample_symlink_name%
+            )
+        )
+    )
+		
+
+    :: Create the symbolic link if a target path is defined
+    if defined target_path (
+	
+        :: Store the full path to the symbolic link in a variable
+        set symlink_full_path=%%F\Assets\!symlink_name!
+
+        if exist "!symlink_full_path!" (
+            rem echo Deleting existing link or folder: "!symlink_full_path!"
+            rmdir "!symlink_full_path!"
+        )
+        rem echo Creating symbolic link "!symlink_full_path!" targeting "!target_path!"
+        mklink /d "!symlink_full_path!" "!target_path!"
+		
+    )
+)
+
+echo All done!