chore(platform): eslint/tsconfig migration + browser utils

Migrate to eslint flat config and composite tsconfig; browser/multi updates
(hideOthers, focusScope).

core/platform/src/multi/debounce/index.ts

@@ -1,49 +0,0 @@
-// eslint-disable
-
-export interface DebounceOptions {
-    /**
-     * Call the function on the leading edge of the timeout, instead of waiting for the trailing edge
-     */
-    readonly immediate?: boolean;
-
-    /**
-     * Call the function on the trailing edge with the last used arguments.
-     * Result of call is from previous call
-     */
-    readonly trailing?: boolean;
-}
-
-const DEFAULT_DEBOUNCE_OPTIONS: DebounceOptions = {
-    trailing: true,
-}
-
-export function debounce<FnArguments extends unknown[], FnReturn>(
-    fn: (...args: FnArguments) => PromiseLike<FnReturn> | FnReturn,
-    timeout: number = 20,
-    options: DebounceOptions = {},
-) {
-    options = {
-        ...DEFAULT_DEBOUNCE_OPTIONS,
-        ...options,
-    };
-
-    if (!Number.isFinite(timeout) || timeout <= 0)
-        throw new TypeError('Debounce timeout must be a positive number');
-
-    // Last result for leading edge
-    let leadingValue: PromiseLike<FnReturn> | FnReturn;
-    
-    // Debounce timeout id
-    let timeoutId: NodeJS.Timeout;
-
-    // Promises to be resolved when debounce is finished
-    let resolveList: Array<(value: unknown) => void> = [];
-
-    // State of currently resolving promise
-    let currentResolve: Promise<FnReturn>;
-
-    // Trailing call information
-    let trailingArgs: unknown[];
-
-
-}

core/platform/src/multi/index.ts

@@ -1,2 +1 @@
 export * from './global';
-// export * from './debounce';