docs (+25 squashed commit)

Squashed commit:

[51a36e00b] faster updates

[7fed94eae] some cleanup

[ea00282b2] make into feature and add constraint

[a2bdfab5a] require sticks centered

[19c5c8773] defaults

[191ebe04f] fix bug

[a50a11de7] fix a dumb bug

[92d6760b7] use same servo selection logic for regular autotrim

[d4a389f78] minor cleanup

[999b968b2] build error

[a1c25b474] don't update trims when gps heading is not valid to avoid changing trims when on the ground

[317bca1f1] add check on ratetarget for when flying in other modes than acro

[8abd5682e] use time since last arm instead of total arm time since boot

[cf3179325] setting name

[78b00bb0f] comment to force new GH check

[e5527a9f4] build error

[6d0e09938] change setting name

[3824ce3f7] more docs

[9e04b5b25] docs

[591cade68] transfer I-term to servo midpoint

[ad97f692d] fix mode

[2d7438b4c] merge conflicts

[290288203] change rotation threshold

[6fc3676cf] always the docs...

[48ba7b7ae] Automatic servo trim

src/main/build/debug.h

@@ -83,5 +83,6 @@ typedef enum {
     DEBUG_FW_D,
     DEBUG_IMU2,
     DEBUG_ALTITUDE,
+    DEBUG_AUTOTRIM,
     DEBUG_COUNT
 } debugType_e;