package: add rm2fb package

[raisjn]

this adds rm2fb (ddvk/remarkable2-framebuffer) package, which is used for app compatibility on the rM2.

to run an app, first start rm2fb-server, then use rm2fb-client <app> to launch the app.

[Eeems]

Since I don't have a rM2 I can't test. Anybody else able to test the builds?

[lcpriest]

Running make repo on this pr threw an error for me.

{16:01}[2.5.1]~/Development/toltec:rmkit-dev/testing ✓ ➭ make repo
./scripts/repo-build package build/package build/repo "$remote_repo"
==> Processing appmarkable
==> Processing calculator
==> Processing chessmarkable
==> Processing draft
==> Processing fingerterm
==> Processing koreader
==> Processing oxide
==> Processing plato
==> Processing reboot-guard
==> Processing recrossable
==> Processing remarkable-splash
==> Processing retris
==> Processing rm2fb
date: illegal option -- -
usage: date [-jnRu] [-d dst] [-r seconds] [-t west] [-v[+|-]val[ymwdHMS]] ...
            [-f fmt date | [[[mm]dd]HH]MM[[cc]yy][.ss]] [+format]
make: *** [repo] Error 1

If someone can give me some tips on what I should run to properly test this, I can run it on my rm2 if I can get past this blocker.

[raisjn]

for testing, see ddvk/remarkable2-framebuffer#35

the build system for PRs also attaches the packages built as artifacts: it's at the bottom of the build check page: https://github.com/toltec-dev/toltec/suites/1697155072/artifacts/31910889 (for the most recent run)

for building, can you share what version of date you have? (use date --version)

[raisjn]

i think enough people (5+) have installed this package and had it work for them

[Eeems]

Due to community testing I'll approve.