Bundle of external apps tweaked for Xtreme.

Apps we include in Xtreme are all modified (some lots more than others). This includes:

• Removing duplicate icons that are part of firmware to support our Asset Packs system
• Removing duplicate keyboard implementations to use our extended system keyboard
• With our system keyboard also support our CLI command input keyboard to type with PC keyboard
• Moving location of save files or changing how they are saved
• Changing application display names to fit our scheme
• Changing how some menus work/look or adding new exclusive menus and features
• Improving or extending functionality and better integrating with Xtreme firmware
• Updating and fixing apps that were abandoned by the original developers

Apps made by the Xtreme team are developed right here, the latest versions will always originate from this repository.

For all other apps we use git subtrees to pull updates from the creator's repository / other sources such as @xMasterX's pack, while also keeping our own tweaks and additions.

We didn't want to have fork repos for each single app since it would get out of hand very quick. Instead, we opted for subtrees.

Subtrees work in a very peculiar way: they pull and compare commit history from a remote repo and apply it to a subdirectory of this repo. That's why the commit history for this repo is so huge, it contains all the commits for all the apps, plus our edits.

To make updating more manageable, we have added another layer on top of subtrees:

• add a new app with .utils/add-subtree.sh <path> <repo url> <branch> [subdir], this will pull the history and create path/.gitsubtree to remember the url, branch and subdir
• run .utils/update-subtree.sh <path> to pull updates for a subtree
• or run .utils/bulk-update-subtrees.sh to do it for all subtrees