refactor(core): Simplify file path handling in openFile

- Remove workspace root path resolution
- Use direct file paths for custom provider configuration files
- Clean up error handling formatting

Author: Oct4Pie

src/integrations/misc/open-file.ts

@@ -27,17 +27,7 @@ interface OpenFileOptions {
 
 export async function openFile(filePath: string, options: OpenFileOptions = {}) {
 	try {
-		// Get workspace root
-		const workspaceRoot = vscode.workspace.workspaceFolders?.[0]?.uri.fsPath
-		if (!workspaceRoot) {
-			throw new Error("No workspace root found")
-		}
-
-		// If path starts with ./, resolve it relative to workspace root
-		const fullPath = filePath.startsWith("./") ? path.join(workspaceRoot, filePath.slice(2)) : filePath
-
-		const uri = vscode.Uri.file(fullPath)
-
+		const uri = vscode.Uri.file(filePath)
 		// Check if file exists
 		try {
 			await vscode.workspace.fs.stat(uri)