feat: add config option for custom watch folders

[pepperoni505]

This PR adds support to define custom watch folders for tauri dev. A new entry under build in config named watchFolders accepts an array of relative (or absolute) paths to watch

[Legend-Master]

Didn't look into it too much yet, just some early feedbacks:

[github-actions]

Package Changes Through d2210bb

There are 3 changes which include tauri-cli with minor, @tauri-apps/cli with minor, tauri-utils 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-utils	2.6.0	2.7.0
tauri-bundler	2.5.2	2.5.3
tauri-runtime	2.7.1	2.7.2
tauri-runtime-wry	2.7.2	2.7.3
tauri-codegen	2.3.1	2.3.2
tauri-macros	2.3.2	2.3.3
tauri-plugin	2.3.1	2.3.2
tauri-build	2.3.1	2.3.2
tauri	2.7.0	2.7.1
@tauri-apps/cli	2.7.1	2.8.0
tauri-cli	2.7.1	2.8.0

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[Legend-Master]

Looks good, do you mind also adding a change file?

https://github.com/tauri-apps/tauri/blob/dev/.changes/README.md

[Legend-Master]

Looks good to me! Just a nitpick

[Legend-Master]

Thanks!