Not sure why I didn't do this right away, but using 1.95 makes the
circles look much better.  Using 2 leads to a small artifact on the
right side so we have to stay slightly below...

Remove the last remaining piece of gfx integration.  With this, the
card10 firmware is now fully rendering using ctx instead!

Reimplement `epic_disp_blit()` without relying on the gfx library.

Make the new ctx based implementation behave just like the old one.
This means _including_ the yend row and xend column.

This fixes the G-Watch and DigiClk not looking as they should.

Use ctx to display the panic message.  The implementation contains a few
safeguards to hopefully deal with any breakage that happended before the
panic.

With the PMIC task calling graphics code, it now needs a bit more stack
space.  Increase the allocation to ensure we won't get a stack overflow
here.

Instead of duplicating the drawing code in the personal state menu,
reuse the method from the parent class.  This reduces code duplication
but most importantly means the personal state app can benefit from fixes
in the "upstream" code.

Concretely, due to the changes related to ctx, this fixes visual
artifacts produced by the "custom" rendering code (black areas to the
right of the text).

Replace the gfx-based implementations of the Epicardium display API
calls with ctx-based ones that try to mimick the old behavior as much as
possible.  In the long run, these functions are just meant for backwards
compatibility while new code should interface with ctx directly (once
this becomes possible).

The implementations in this changeset are closely based on pippin's
original Pycardium display API reimplementation.

Co-developed-by: Øyvind Kolås <pippin@gimp.org>

Adds the most basic ctx integration, by just initializing the context
and nothing more.

From upstream commit 35100785e2c4 ("ctx: rasterizer, micro optimizations
in rasterizer_fill_rect").

The integration is mostly a copy of pippin's original integration with
the biggest change being the use of a monospace default font.  This font
is autogenerated from lib/ctx/fira-mono.ttf at build-time so it can be
easily replaced with a different one (just overwrite said file).

git-url: https://ctx.graphics/.git


Co-developed-by: Øyvind Kolås <pippin@gimp.org>

Move display initialization from hardware_early_init() into the display
module to keep it closer to related functionality.

Move the display API code into the display/ subdirectory as well.

To not try and replace the entire gfx stack at once, start by "splicing
in" the new driver for the two to work alongside each other.  Primarily
the new driver takes control now and we reconfigure the orientation on
the fly whenever the old driver wants to update the screen.

Currently we're still working with the reference driver from Waveshare.
This driver seems hacked together and also does not really fit for what
we're doing with the display.  Even less so because it configures the
display upside down.

As a first step towards dropping this vendor library, introduce
a reimplementation which is purpose built to our usecase.  This new
library configures the screen right side up natively but still allows to
change to the legacy orientation on the fly to support the old codebase.

See merge request !481

ci: Expose artifacts for debug builds

See merge request !482

See merge request !478

See merge request !480

The loop condition in the epic_sleep based sleep could underflow if an
interrupt introduced too much delay at the end.

The clock source of epicardium is not very stable and can drift multiple
percent. This has an effect on epic_sleep() and can lead to sleeps which
are longer than anticipated. With this change we slowly move towards our
sleep goal using multiple calls. This is less efficient but leads to
precise results.

This can be used by the second core to signal that the system can go to
a light sleep to recuce power consumption.

See merge request !475

feat(personal-state): Convert personal state to use the work queue

See merge request !479

This is in perparation of epicardium being allowed to change the system
clock source. By using the alternate clock source for the systick, we
can keep accurate (tick) time on pycardium.

This reduces the power consumption of the system by around .1 mA when
the personal state is not active.

change(uart): Use low power HIRC8 for uart clock

See merge request card10/firmware!477

Timer frequency is now held close to a value which can be achieved both
with a 48 MHz PCLK (96 MHz system clock) and a 7.5 MHz PCLK (15 MHz
system clock).

If even lower PCLKs should be supported, the frequency of the timer has
to be changed as well.