feat: MOD-300 Servers modpack upload progress feedback

[IMB11]

No description provided.

[Copilot]

Pull Request Overview

This PR adds modpack upload progress feedback for servers by updating the modpack reinstall process and enhancing the user interface for upload feedback.

• Updated the reinstallFromMrpack function to use XMLHttpRequest for tracking file upload progress and returning both a promise and an onProgress callback.
• Enhanced the PlatformMrpackModal.vue component to display an animated progress bar and provide user notifications for missing file selection and upload errors.

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
apps/frontend/src/composables/pyroServers.ts	Modified reinstallFromMrpack to use XMLHttpRequest with progress events and updated its type.
apps/frontend/src/components/ui/servers/PlatformMrpackModal.vue	Introduced a progress bar with transition animations and revised error handling for uploads.

Comments suppressed due to low confidence (3)

apps/frontend/src/composables/pyroServers.ts:604

• [nitpick] Consider using a more formal error message, such as 'upload cancelled', to improve clarity and maintain consistency with other error messages.

xhr.onabort = () => reject(new Error("[pyroservers] .mrpack u cancelled"));

apps/frontend/src/composables/pyroServers.ts:605

• [nitpick] Consider using a more formal error message, such as 'upload timed out', to align with the application's error messaging style.

xhr.ontimeout = () => reject(new Error("[pyroservers] .mrpack u timed out"));

apps/frontend/src/components/ui/servers/PlatformMrpackModal.vue:222

• [nitpick] Review the capitalization of error titles for consistency. Using 'Reinstall Failed' might be more consistent with other notifications.

title: "Reinstall failed",

[IMB11]

LGTM