feat(completion): rename and modify CodeLanguageProvider to support code fence languages

The `CodeLanguageProvider` class has been renamed to `CodeFenceLanguageProvider` to better reflect its functionality, which is to provide completions for code fence languages within the DevInTools. Additionally, the corresponding references to `CodeLanguageProvider` in `DevInCompletionContributor` have been updated to use the new class name. This change ensures that the completion provider correctly identifies and offers suggestions for code fence languages, enhancing the user experience.

Author: phodal

exts/devin-lang/src/main/kotlin/cc/unitmesh/devti/language/completion/CodeLanguageProvider.kt renamed to exts/devin-lang/src/main/kotlin/cc/unitmesh/devti/language/completion/CodeFenceLanguageProvider.kt

@@ -10,7 +10,7 @@ import com.intellij.ui.DeferredIconImpl
 import com.intellij.util.ProcessingContext
 import javax.swing.Icon
 
-class CodeLanguageProvider : CompletionProvider<CompletionParameters>() {
+class CodeFenceLanguageProvider : CompletionProvider<CompletionParameters>() {
     override fun addCompletions(
         parameters: CompletionParameters,
         context: ProcessingContext,

exts/devin-lang/src/main/kotlin/cc/unitmesh/devti/language/completion/DevInCompletionContributor.kt

@@ -11,7 +11,7 @@ class DevInCompletionContributor : CompletionContributor() {
     private val INPUT_DUMMY_IDENTIFIER = "DevInDummy"
 
     init {
-        extend(CompletionType.BASIC, psiElement(DevInTypes.LANGUAGE_ID), CodeLanguageProvider())
+        extend(CompletionType.BASIC, psiElement(DevInTypes.LANGUAGE_ID), CodeFenceLanguageProvider())
         extend(CompletionType.BASIC, psiElement(DevInTypes.VARIABLE_ID), CustomVariableProvider())
     }