Automatically install required browser files for Playwright

This will prevent this exception:

> Microsoft.Playwright.PlaywrightException
> Executable doesn't exist at ~/Library/Caches/ms-playwright/chromium-1148/chrome-mac/Chromium.app/Contents/MacOS/Chromium
> ╔════════════════════════════════════════════════════════════╗
> ║ Looks like Playwright was just installed or updated.       ║
> ║ Please run the following command to download new browsers: ║
> ║                                                            ║
> ║     pwsh bin/Debug/netX/playwright.ps1 install             ║
> ║                                                            ║
> ║ <3 Playwright Team                                         ║
> ╚════════════════════════════════════════════════════════════╝
>    at Microsoft.Playwright.Transport.Connection.InnerSendMessageToServerAsync[T](ChannelOwner object, String method, Dictionary`2 dictionary, Boolean keepNulls) in /_/src/Playwright/Transport/Connection.cs:line 206
>    at Microsoft.Playwright.Transport.Connection.WrapApiCallAsync[T](Func`1 action, Boolean isInternal) in /_/src/Playwright/Transport/Connection.cs:line 535
>    at Microsoft.Playwright.Core.BrowserType.LaunchAsync(BrowserTypeLaunchOptions options) in /_/src/Playwright/Core/BrowserType.cs:line 56
>    at Microsoft.Playwright.Xunit.BrowserService.CreateBrowser(IBrowserType browserType) in /_/src/Playwright.Xunit/BrowserService.cs:line 56
>    at Microsoft.Playwright.Xunit.BrowserService.<>c__DisplayClass5_0.<<Register>b__0>d.MoveNext() in /_/src/Playwright.Xunit/BrowserService.cs:line 46
> --- End of stack trace from previous location ---
>    at Microsoft.Playwright.Xunit.WorkerAwareTest.RegisterService[T](String name, Func`1 factory) in /_/src/Playwright.Xunit/WorkerAwareTest.cs:line 54
>    at Microsoft.Playwright.Xunit.BrowserTest.InitializeAsync() in /_/src/Playwright.Xunit/BrowserTest.cs:line 45
>    at Microsoft.Playwright.Xunit.ContextTest.InitializeAsync() in /_/src/Playwright.Xunit/ContextTest.cs:line 35
>    at Microsoft.Playwright.Xunit.PageTest.InitializeAsync() in /_/src/Playwright.Xunit/PageTest.cs:line 35

This helps with #2286.

Author: 0xced

src/Playwright.MSTest/WorkerAwareTest.cs

@@ -46,6 +46,8 @@ public void WorkerSetup()
         {
             _currentWorker = new();
         }
+
+        new Program().Run(["install", "--with-deps", PlaywrightSettingsProvider.BrowserName], throwOnError: true);
     }
 
     [TestCleanup]

src/Playwright.NUnit/WorkerAwareTest.cs

@@ -70,6 +70,8 @@ public void WorkerSetup()
         {
             AssertionsBase.SetDefaultTimeout(PlaywrightSettingsProvider.ExpectTimeout.Value);
         }
+
+        new Program().Run(["install", "--with-deps", PlaywrightSettingsProvider.BrowserName], throwOnError: true);
     }
 
     [TearDown]

src/Playwright.Xunit/WorkerAwareTest.cs

@@ -69,6 +69,8 @@ async public override Task InitializeAsync()
         {
             AssertionsBase.SetDefaultTimeout(PlaywrightSettingsProvider.ExpectTimeout.Value);
         }
+
+        new Program().Run(["install", "--with-deps", PlaywrightSettingsProvider.BrowserName], throwOnError: true);
     }
 
     public async override Task DisposeAsync()