Prevent ligatures between inlay hints and editor contents (Fix microsoft#170449)

https://www.w3.org/TR/2023/CRD-css-text-3-20230213/#boundary-shaping

Author: r3m0t

src/vs/editor/browser/editorDom.ts

@@ -342,6 +342,7 @@ export interface CssProperties {
 	fontWeight?: string;
 	fontSize?: string;
 	fontFamily?: string;
+	unicodeBidi?: string;
 	textDecoration?: string;
 	color?: string | ThemeColor;
 	backgroundColor?: string | ThemeColor;

src/vs/editor/contrib/inlayHints/browser/inlayHintsController.ts

@@ -495,6 +495,7 @@ export class InlayHintsController implements IEditorContribution {
 					fontSize: `${fontSize}px`,
 					fontFamily: `var(${fontFamilyVar}), ${EDITOR_FONT_DEFAULTS.fontFamily}`,
 					verticalAlign: isUniform ? 'baseline' : 'middle',
+					unicodeBidi: 'isolate'
 				};
 
 				if (isNonEmptyArray(item.hint.textEdits)) {