New led functions gps bar battery bar altitude (#13404)

New led functions gps bar battery bar altitude (#13404)

* Add LED functions: Battery Bar, GPS Bar

Battery Bar:
Indicates the battery percentage with a loading bar style

GPS Bar:
Indicates the amount of locked GPS satellites with a loading bar style

* LED altitude function

Adds a new function: LED altitude.
Sets the LED color based on the altitude, measured from the initialized position.

* set led color to background if value decreases

Even if the gps satellite count decreases at a later point in time, the LEDs update correctly now.
It is the same for the battery level function.
LEDs color changes more strongly now when based on altitude.

* Added proper ifdefs for GPS and Barometer

* fixed unittest and use estimate altitute

- fixed unittest

- cleaner indentation

- the altitude function now uses the estimate function instead of the raw value (gps+barometer)

* counters in struct, gps bar color gradient

- Counters for the led bar are now handled in a structure.

- Moved the led bar code to a seperate function that is only called when the led config changes.

- improved usefulness of the gps led bar with less than 4 leds installed by adding a color gradient.

* Update src/main/io/ledstrip.c

Co-authored-by: Petr Ledvina <ledvinap@gmail.com>
* Update src/main/io/ledstrip.c

Co-authored-by: Petr Ledvina <ledvinap@gmail.com>
* Update src/main/io/ledstrip.c

Co-authored-by: Petr Ledvina <ledvinap@gmail.com>
* Update src/main/io/ledstrip.h

Co-authored-by: Petr Ledvina <ledvinap@gmail.com>
* Update src/main/io/ledstrip.c

Co-authored-by: Petr Ledvina <ledvinap@gmail.com>
* one min led for very low battery, use failsafe sats to interpolate

- at least one led is lit up for the battery/gps bar at all time (to show color gradient, also making the function more useful when only applying it to 1 led).

- gps bar now takes the failsafe min sats (or default 8) to interpolate between red and green.

- rewrote the led codes to be less fragile

- some structural changes that also adress comments on the pull request

* fix code if no gps rescue is used

fixes code if no gps rescue is used.
sets the default min sats to 8.

* Update src/main/io/ledstrip.c

Co-authored-by: Petr Ledvina <ledvinap@gmail.com>
* Fixes per review ledvinap

* Fixes per review Ledvinap 2

* Update src/main/io/ledstrip.c

* Update src/main/io/ledstrip.c

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Co-authored-by: jonas-becker <jonas@Thinkpad>
Co-authored-by: Petr Ledvina <ledvinap@gmail.com>
Co-authored-by: Mark Haslinghuis <mark@numloq.nl>