[Feature Request] [Typescript Extension] Less redundant inlay hints for arrow function vars/consts

还没有人认领这个 Issue。

Example ts file without inlay hints:
```ts
//No inlay hints
import { createContext, useContext } from "solid-js";
import type { Application } from "pixi.js";

export const PixiContext = createContext();

export const usePixi = () => useContext(PixiContext)!;
```

Example ts file with all inlay hints:
```ts
//All inlay hints
import { createContext, useContext } from "solid-js";
import type { Application } from "pixi.js";

export const PixiContext /*: Context | undefined>*/ = createContext();

export const usePixi /*: () => Application*/ = () /*: Application<...*/ => useContext(PixiContext)!;
```

My suggestion is to extend the `TypeScript › Inlay Hints › Variable Types: Suppress When Type Matches Name` setting to also hide the inlay hint for a variable/constant when its value is an **arrow function** that already displays its own return type inlay hint.

Example ts file with my suggestion:
```ts
//Feature suggestion
import { createContext, useContext } from "solid-js";
import type { Application } from "pixi.js";

export const PixiContext /*: Context | undefined>*/ = createContext();

export const usePixi = () /*: Application*/ => useContext(PixiContext)!;
```

This would avoid redundant type information when the variable name and the function's return type provide sufficient context.

首先定位 TypeScript 的内嵌提示实现以及“Variable Types: Suppress When Type Matches Name”设置。比较现有的箭头函数返回类型提示与所请求的变量提示抑制，然后添加测试覆盖，展示冗余的变量提示会被隐藏，而返回提示仍然保留。

由索引模型根据 Issue 内容生成。