Add Qalam

[nim444]

Adds Qalam to Apps → Miscellaneous (alphabetical, between Openreads and RustDesk). Qalam turns a Galaxy phone's S Pen into a pen tablet for a Mac: hover moves the cursor, or the pen writes over the Mac's screen while recording. The Android app is the pen pad; it pairs with an open-source Mac menu-bar app from the same repository.

1. Free and open source: Apache-2.0.
2. Source code available: https://github.com/nim444/qalam (android/).
3. Privacy: no ads, no analytics, no accounts, no internet access beyond the local network. Pen data goes only to the paired Mac, encrypted (AES-256-GCM).
4. No proprietary elements: platform SDK only; no Google Play Services, Firebase or other proprietary libraries (JUnit for tests only).
5. Stable to use: works end to end (pairing, cursor, ink); CI builds the APK and runs the crypto and protocol tests on every push.
6. Actively developed and maintained.
7. Documentation: the README covers setup, pairing, usage and security; docs/ has the design and the wire protocol.
8. Free of charge.

Not on F-Droid or IzzyOnDroid yet, so this is a project-page-only entry.

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[offa]

Thanks for your project. Since it is very new, let's give it some more time.