feat(cli): allow merging multiple configuration values

[lucasfernog]

Currently the dev/build/bundle commands can only merge a single Tauri configuration value (file or raw JSON string), which imposes a limitation in scenarios where you need more flexibility (like multiple app flavors and environments). This changes the config CLI option to allow multiple values, letting you merge multiple Tauri config files with the main one.

[github-actions]

Package Changes Through be451e2

There are 6 changes which include tauri with minor, @tauri-apps/cli with minor, tauri-cli with minor, @tauri-apps/api with minor, tauri-runtime-wry with minor, tauri-bundler with patch

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	2.3.0	2.4.0
tauri-bundler	2.2.4	2.2.5
tauri-runtime-wry	2.4.1	2.5.0
tauri	2.3.1	2.4.0
@tauri-apps/cli	2.3.1	2.4.0
tauri-cli	2.3.1	2.4.0

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