feat: highlight Gradle Kotlin as Kotlin

- Grade Kotlin is almost the as Kotlin syntax, so render it as such.
- Resolves #6138
- Unit test added.

modules/highlight/highlight.go

@@ -137,7 +137,8 @@ func CodeFromLexer(lexer chroma.Lexer, code string) template.HTML {
 // For the case where Enry recognizes the language, but doesn't use the naming
 // that Chroma expects.
 var normalizeEnryToChroma = map[string]string{
-	"F#": "FSharp",
+	"F#":                "FSharp",
+	"Gradle Kotlin DSL": "Kotlin",
 }
 
 // File returns a slice of chroma syntax highlighted HTML lines of code and the matched lexer name

modules/highlight/highlight_test.go

@@ -121,6 +121,12 @@ c=2
 			want:      lines(`<span class="k">module</span> <span class="nn">Crypt</span> <span class="o">=</span> <span class="k">let</span> <span class="nv">generateCryptTable</span><span class="o">:</span> <span class="n">array</span><span class="o">&lt;</span><span class="kt">uint32</span><span class="o">&gt;</span> <span class="o">=</span>`),
 			lexerName: "FSharp",
 		},
+		{
+			name:      "test.gradle.kts",
+			code:      "@file:Suppress(\"UnstableApiUsage\")",
+			want:      lines("<span class=\"nd\">@file</span><span class=\"p\">:</span><span class=\"n\">Suppress</span><span class=\"p\">(</span><span class=\"s2\">&#34;</span><span class=\"s2\">UnstableApiUsage</span><span class=\"s2\">&#34;</span><span class=\"p\">)</span>"),
+			lexerName: "Kotlin",
+		},
 	}
 
 	for _, tt := range tests {