Agile Ink breadth increase

Developing Agile Ink has been a lot of fun. This started strictly as an app for myself, running on my own Boox tablet. By the time I posted about it online it was already focused on becoming usable by a broader audience of Boox users. More time has passed, and I've refactored the app to support a broader user base: Any and all Android tablet users.

Agile Ink now includes a built-in Notes feature, so users can take their notes right inside the app and not be forced to use external Notes apps. It defaults to standard Android input, but supports Boox accelerated stylus input, OpenInkBridge, and will soon support Samsung s-pen as well. 

As originally planned, the base app is free and provides a valuable set of features. Users can install Agile Ink for free and make use of basic features forever at no cost.

I'm still working through the cost structure for the extended features, which include:

- Core: Unlocks additional features to assist in task planning and gathering TODO content from more sources.

- Boox Notes Access: This has been a particular challenge, taking up the vast majority of development effort to date. It is working well and enables users to browser for and render their native Boox Notes content inside Agile Ink as true strokes (not a flat export). Rendering in real strokes was required to support on-device handwriting recognition. This is my personal daily driver - I take ~80 pages of notes each week and collect my TODO items from them all using Agile Ink.

- Cloud: This will be, unfortunately, a subscription service. I don't like them myself, but the cloud features I'm adding to the app generate recurring costs so I can't include them for free or through a one-time purchase. I have a slew of features in-flight including automatic cloud backup, data sharing between logged in devices, a PWA webapp to access and manage your tasks from any browser, and a smartphone companion app supporting quick capture and embedding of phots into your TODO items. The first feature is already working: connecting to Microsoft OneNote as another source of content for your TODOs.

Special thanks to my closed-beta testers, your feedback has been significantly helpful :)

Official release date is still TBD, but it's creeping up closer every day!