Refactor test and update regex to clean name strings (#8)

Refactored unit test to use [Theory] and included multiple inline data sets for better coverage of name cleaning logic. Also updated the regex pattern to allow hyphens in names, ensuring more accurate cleaning of input strings.

DotPrompt.Tests/PromptFileTests.cs

@@ -167,8 +167,12 @@ public void FromStream_WithUnreadableStream_ThrowsException()
         Assert.Contains("Stream is not in a readable state", exception.Message);
     }
 
-    [Fact]
-    public void FromStream_WithInvalidCharactersInNameForWindows_CleansTheName()
+    [Theory]
+    [InlineData("clean\r\n\r\nthis name", "clean-this-name")]
+    [InlineData("do-not-clean", "do-not-clean")]
+    [InlineData("My COOL nAMe", "my-cool-name")]
+    [InlineData("this <is .pretty> un*cl()ean", "this-is-pretty-unclean")]
+    public void FromStream_WithNamePart_CleansTheName(string inputName, string expectedName)
     {
         const string content = "prompts:\n  system: System prompt\n  user: User prompt";
         using var ms = new MemoryStream(Encoding.UTF8.GetBytes(content));

DotPrompt/PromptFile.cs

@@ -275,7 +275,7 @@ private static string CleanName(string name)
         return trimmedName;
     }
 
-    [GeneratedRegex(@"([^A-Za-z0-9 \r\n]*)", RegexOptions.Multiline | RegexOptions.Compiled)]
+    [GeneratedRegex(@"([^A-Za-z0-9 \-\r\n]*)", RegexOptions.Multiline | RegexOptions.Compiled)]
     private static partial Regex InvalidCharactersRegex();
 
     [GeneratedRegex(@"[\s\r\n]+", RegexOptions.Multiline | RegexOptions.Compiled)]