The player's limbs don't stop moving when idling in swim mode

Steps to Reproduce:

1. Swim towards a corner, with a block above you.

2. Stop moving.

Observed Results:
The player's arms and legs keep moving.

Expected Results:
The swimming animation pauses, and continues when you start moving again.

Screenshots/Videos attached: No

Notes: This can be fixed by changing the animation from this...

"animation.player.swim" : {
			"animation_length" : 1.3,
			"loop" : true,
			"override_previous_animation" : true,
			"bones" : {
				"leftarm" : {
					"rotation" : {
						"0" : [ 0.0, 180.0, 180.0 ],
						"0.7" : [ 0.0, 180.0, 287.2 ],
						"1.1" : [ 90.0, 180.0, 180.0 ],
						"1.3" : [ 0.0, 180.0, 180.0 ]
					}
				},
				"rightarm" : {
					"rotation" : {
						"0" : [ 0.0, 180.0, -180.0 ],
						"0.7" : [ 0.0, 180.0, -287.2 ],
						"1.1" : [ 90.0, 180.0, -180.0 ],
						"1.3" : [ 0.0, 180.0, -180.0 ]
					}
				},
				"root" : {
					"position" : [ 0.0, "(math.sin(query.target_x_rotation) * 24.0 + 3.0) * variable.swim_amount", "(math.cos(query.target_x_rotation) * 24.0 + 9.0) * variable.swim_amount" ],
					"rotation" : [ "variable.swim_amount * (90 + query.target_x_rotation)", 0.0, 0.0 ]
				}
			}
		},
		"animation.player.swim.legs" : {
			"loop" : true,
			"override_previous_animation" : true,
			"bones" : {
				"leftleg" : {
					"rotation" : [ "math.lerp(0.0, math.cos(query.life_time * 390.0 + 180.0) * 17.2, variable.swim_amount)", 0.0, 0.0 ]
				},
				"rightleg" : {
					"rotation" : [ "math.lerp(0.0, math.cos(query.life_time * 390.0) * 17.2, variable.swim_amount)", 0.0, 0.0 ]
				}
			}
		},
		"animation.player.swim.legs.single" : {
			"loop" : true,
			"override_previous_animation" : true,
			"bones" : {
				"leftleg" : {
					"rotation" : [ "math.lerp(0.0, math.cos(query.life_time * 390.0) * 17.2, variable.swim_amount)", 0.0, 0.0 ]
				},
				"rightleg" : {
					"rotation" : [ "math.lerp(0.0, math.cos(query.life_time * 390.0) * 17.2, variable.swim_amount)", 0.0, 0.0 ]
				}
			}
		}

to this:

"animation.player.swim" : {
			"loop" : true,
			"bones" : {
				"leftarm" : {
					"rotation" : [ "math.lerp(0.0, (math.mod(query.modified_distance_moved, 26.0) < 22.0 ? 90.0 * math.clamp(math.mod(query.modified_distance_moved, 26.0) - 14.0, 0.0, 8.0) / 8.0 : 90.0 - 90.0 * (math.mod(query.modified_distance_moved, 26) - 22.0) / 4.0) - this, variable.swim_amount)", "math.lerprotate(0.0, 180.0 - this, variable.swim_amount)", "math.lerprotate(0.0, (math.mod(query.modified_distance_moved, 26.0) < 14.0 ? 180.0 + 107.18873 * math.mod(query.modified_distance_moved, 26.0) / 14.0 : 287.18873 - 107.18873 * math.clamp(math.mod(query.modified_distance_moved, 26) - 14.0, 0.0, 8.0) / 8.0) - this, variable.swim_amount)" ]
				},
				"rightarm" : {
					"rotation" : [ "math.lerp(0.0, (math.mod(query.modified_distance_moved, 26.0) < 22.0 ? 90.0 * math.clamp(math.mod(query.modified_distance_moved, 26.0) - 14.0, 0.0, 8.0) / 8.0 : 90.0 - 90.0 * (math.mod(query.modified_distance_moved, 26) - 22.0) / 4.0) - this, variable.swim_amount)", "math.lerp(0.0, 180.0 - this, variable.swim_amount)", "math.lerp(0.0, (math.mod(query.modified_distance_moved, 26.0) < 14.0 ? 180.0 - 107.18873 * math.mod(query.modified_distance_moved, 26.0) / 14.0 : 72.81127 + 107.18873 * math.clamp(math.mod(query.modified_distance_moved, 26) - 14.0, 0.0, 8.0) / 8.0) - this, variable.swim_amount)" ]
				},
				"root" : {
					"position" : [ 0.0, "math.sin(math.lerp(-90.0, query.target_x_rotation, variable.swim_amount)) * 17.0 + 17.0 - 12.0 * variable.swim_amount", "math.cos(math.lerp(-90.0, query.target_x_rotation * query.is_in_water, variable.swim_amount)) * 17.0" ],
					"rotation" : [ "variable.swim_amount * (90.0 + query.target_x_rotation)", 0.0, 0.0 ]
				}
			}
		},
		"animation.player.swim.legs" : {
			"loop" : true,
			"bones" : {
				"leftleg" : {
					"rotation" : [ "math.lerp(0.0, math.cos(query.modified_distance_moved * 19.09859 + 180.0) * 17.18873 - this, variable.swim_amount)", 0.0, 0.0 ]
				},
				"rightleg" : {
					"rotation" : [ "math.lerp(0.0, math.cos(query.modified_distance_moved * 19.09859) * 17.18873 - this, variable.swim_amount)", 0.0, 0.0 ]
				}
			}
		},
		"animation.player.swim.legs.single" : {
			"loop" : true,
			"bones" : {
				"leftleg" : {
					"rotation" : [ "math.lerp(0.0, math.cos(query.modified_distance_moved * 19.09859) * 17.18873 - this, variable.swim_amount)", 0.0, 0.0 ]
				},
				"rightleg" : {
					"rotation" : [ "math.lerp(0.0, math.cos(query.modified_distance_moved * 19.09859) * 17.18873 - this, variable.swim_amount)", 0.0, 0.0 ]
				}
			}
		}

This fix also addresses MCPE-122663, and adds a smooth transition to the swimming pose for the limbs, which can't be done with a custom anim_time_update and keyframes.

The math has been simplified as much as possible, using clamps instead of multiple conditions. It can be shortened further by replacing every instance of math.mod(query.modified_distance_moved, 26.0) with a variable.