Temporarily add windmill only manually to webgl assets

spine-ts/spine-webgl/example/assets/windmill-ess.atlas

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+windmill-ess.png
+size:939,1702
+filter:Linear,Linear
+pma:true
+bush1
+bounds:544,23,110,74
+offsets:1,1,112,76
+bush2
+bounds:544,99,131,88
+offsets:1,1,133,90
+flower-leaf-back
+bounds:901,206,30,20
+offsets:1,1,32,22
+flower-leaf-front
+bounds:869,206,30,20
+offsets:1,1,32,22
+flower-shadow
+bounds:544,7,42,14
+offsets:1,2,46,17
+flower-stem
+bounds:544,1652,8,48
+offsets:1,3,10,53
+flower1
+bounds:867,134,42,36
+offsets:1,1,44,38
+flower2
+bounds:869,172,37,32
+offsets:1,1,39,34
+flower3
+bounds:741,53,27,29
+offsets:2,1,30,31
+heat
+bounds:773,86,92,101
+offsets:2,1,96,103
+rooster
+bounds:867,86,52,46
+offsets:1,2,54,49
+tree1-leaves1
+bounds:677,84,94,103
+offsets:2,1,97,106
+tree1-leaves2
+bounds:774,287,93,96
+offsets:1,2,95,99
+tree1-leaves3
+bounds:656,2,83,80
+offsets:1,2,85,84
+tree1-leaves4
+bounds:857,2,82,80
+offsets:2,2,85,84
+rotate:90
+tree1-trunk
+bounds:544,379,125,162
+offsets:1,2,127,165
+tree2-leaves1
+bounds:677,189,95,104
+offsets:3,1,99,106
+tree2-leaves2
+bounds:774,189,93,96
+offsets:1,2,95,99
+tree2-leaves3
+bounds:774,385,83,80
+offsets:2,2,87,84
+tree2-leaves4
+bounds:773,3,82,81
+offsets:2,2,85,84
+tree2-leaves5
+bounds:691,385,81,82
+offsets:2,2,84,84
+tree2-trunk
+bounds:544,189,75,188
+offsets:1,1,77,190
+windmill-base
+bounds:2,543,1106,922
+offsets:1,1,1108,924
+rotate:90
+windmill-blades
+bounds:2,3,540,538
+offsets:1,1,542,540
+windmill-blades-wood-h
+bounds:2,1677,540,23
+offsets:1,1,542,25
+windmill-blades-wood-v
+bounds:2,1651,24,538
+offsets:1,1,26,540
+rotate:90