Basic Particle system defining particle structs, some emitters and particle to LED rendering

not yet final version but working

update from another commit that got lost

this somehow also got lost from an earlier commit

particle box now is more random in random mode (still a work in progress)
firework is now more configurable by sliders

particle attractor animation does not work, somthing wrong with pointer allocation, it worked with static variables

still unknown, why more than 256 particles are needed in memory allocation to not make it crash, but it works for now

at the expense of more ram usage, animations now have more options for color control (already used in fireworks now)

also fixed a bug in fire animation

improved efficiency for stackup (pushback), added code to correctly determine direction if particles meed (probably overkill but now its there)

untested, need to verify it works

…ables to 32bit for faster calculation

32bit variables are faster on ESP32, so use them whenever a variable is used a lot, it saves one instruction per access.

it made very little difference in performance, but for ESP8266 it may matter so it is set permanently there. graphically the difference is also very small (sometimes a particle gets brighter or less saturated)

also tweaked some of the FX

particle pile-up did not work correctly, now fixed

…ptions to perlin noise

touch is implemented differently on S2 and S3, these changes make touch buttons work on S2 and S3

now better fits the default threshold value of 32

This reverts commit d21ad8e.

This reverts commit 0904155.

-removed wrap_update function, now integrated into move_update
-added more 'out of bounds' checking in fire functions, may speed it up a little

-removed particle box 'rocking boat' (buggy) and replaced with random sloshing.
-removed comments
-changed some variables into 32bit for speed boost on ESP32
-added link to KB at the top of FX.cpp

removed / added comments