fix: add css-agent declarations (#4361)

* fix: add css-agent declarations

* fix: remove css-agent ts

tns-core-modules/debugger/css-agent.d.ts

@@ -0,0 +1,59 @@
+export interface CSSProperty {
+    name: string;
+    value: string;
+    disabled: boolean;
+}
+export interface ShorthandEntry {
+    name: string;
+    value: string;
+}
+export interface CSSStyle {
+    cssProperties: CSSProperty[];
+    shorthandEntries: ShorthandEntry[];
+    cssText?: string;
+}
+export interface Value {
+    text: string;
+}
+export interface SelectorList {
+    selectors: Value[];
+    text: string;
+}
+export interface CSSRule {
+    selectorList: SelectorList;
+    origin: string;
+    style: CSSStyle;
+    styleSheetId?: string;
+}
+export interface RuleMatch {
+    rule: CSSRule;
+    matchingSelectors: number[];
+}
+export interface InheritedStyleEntry {
+    matchedCSSRules: RuleMatch[];
+    inlineStyle?: CSSStyle;
+}
+export interface CSSComputedStyleProperty {
+    name: string;
+    value: string;
+}
+export interface PlatformFontUsage {
+    familyName: string;
+    glyphCount: number;
+    isCustomFont: boolean;
+}
+export interface CSSStyleSheetHeader {
+    styleSheetId: string;
+    frameId: string;
+    sourceUrl: string;
+    origin: string;
+    title: string;
+    disabled: boolean;
+    isInLine: boolean;
+    startLine: number;
+    startColumn: number;
+}
+export interface PseudoElementMatches {
+    pseudoType: string;
+    matches: RuleMatch[];
+}