Add one-click update flow to download and install latest GitHub release

[CySSoO]

Motivation

• Provide a one-click way to download and install the latest Everblock release from GitHub when a newer version is detected and reload the module configuration page after install.

Description

• Add handling for submitEverblockUpdate in getContent() and expose an everblock_update_action admin URL to the configure template via Smarty.
• Implement processEverblockUpdate() which downloads the release zip from the GitHub tag, extracts it, locates the module source inside the archive, and replaces the current module files.
• Add helper methods locateEverblockSource(), replaceModuleFiles(), recursiveCopy(), removeDirectory(), and redirectToModuleConfiguration() to support safe installation and cleanup.
• Add a form/button to views/templates/admin/configure.tpl to trigger the update (submitEverblockUpdate) and display a short notice that the page will reload after update.

Testing

• No automated tests were run on the modified code.

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Codex Task