Add support for upgrading across the "vite boundary" of ember-cli 6.8

[pichfl]

Updating the blueprint resolution and update logic to support ember-cli's transition from built-in blueprints to standalone packages (@ember-tooling/classic-build-app-blueprint and @ember-tooling/classic-build-addon-blueprint).

• Added constants for new default app and addon blueprint package names
• Enhanced blueprint version resolution to handle custom version ranges (e.g., when updating past published versions)
• Improved isDefaultAddonBlueprint detection logic to properly identify new blueprint packages and handle missing keywords
• Automatic blueprint migration: projects updating to ember-cli 6.8.0-beta.1+ with the default app blueprint now automatically switch to @ember-tooling/classic-build-app-blueprint
• Cleaned up redundant code and improved JSDoc documentation

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This work is supported by the Mainmatter Ember Initiative.

[pichfl]

This was abandoned in favor of #1280