feat: add WebviewWindow/Webview::devtools

[amrbashir]

closes #10849

[github-actions]

Package Changes Through ef1c10e

There are 9 changes which include tauri with minor, tauri-bundler with minor, tauri-cli with minor, @tauri-apps/cli with minor, tauri-utils with minor, @tauri-apps/api with minor, tauri-runtime-wry with minor, tauri-macros with patch, tauri-runtime with minor

Planned Package Versions

The following package releases are the planned based on the context of changes in this pull request.

package	current	next
@tauri-apps/api	2.0.3	2.1.0
tauri-utils	2.0.2	2.1.0
tauri-bundler	2.0.4	2.1.0
tauri-runtime	2.1.1	2.2.0
tauri-runtime-wry	2.1.2	2.2.0
tauri-codegen	2.0.2	2.0.3
tauri-macros	2.0.2	2.0.3
tauri-plugin	2.0.2	2.0.3
tauri-build	2.0.2	2.0.3
tauri	2.0.6	2.1.0
@tauri-apps/cli	2.0.4	2.1.0
tauri-cli	2.0.4	2.1.0

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[FabianLars]

Can we include in the docs that it's enabled by default?