fix(cli): broken v1 updater migration, add TOML support, closes #10508

[lucasfernog]

• make the v1 config migration more resilient by checking null values
• fix "targets: all" incorrectly migrating createUpdaterArtifacts when there's no updater configuration (this is problematic because this targets config is the default)
• migrate Tauri.toml
• add more tests

[github-actions]

Package Changes Through 2978cc3

There are 6 changes which include tauri-build with prepatch, tauri-codegen with prerelease, tauri-utils with prerelease, tauri-cli with prerelease, @tauri-apps/cli with prerelease, tauri with prerelease

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	2.0.0-rc.2	2.0.0-rc.3
tauri-bundler	2.0.1-rc.1	2.0.1-rc.2
tauri-runtime	2.0.0-rc.2	2.0.0-rc.3
tauri-runtime-wry	2.0.0-rc.2	2.0.0-rc.3
tauri-codegen	2.0.0-rc.2	2.0.0-rc.3
tauri-macros	2.0.0-rc.2	2.0.0-rc.3
tauri-plugin	2.0.0-rc.2	2.0.0-rc.3
tauri-build	2.0.0-rc.2	2.0.1-rc.0
tauri	2.0.0-rc.2	2.0.0-rc.3
@tauri-apps/cli	2.0.0-rc.3	2.0.0-rc.4
tauri-cli	2.0.0-rc.3	2.0.0-rc.4

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