tests: move bitmaptools files to their own directory

tests/circuitpython-manual/bitmaptools/dither.py

@@ -0,0 +1,18 @@
+import bitmaptools
+import displayio
+import _bmp16
+
+if "/" in __file__:
+    here = __file__.rsplit("/", 1)[0]
+else:
+    here = "."
+
+c = displayio.Colorspace.BGR565
+
+b1 = _bmp16.loadbmp16(here + "/minerva16.bmp")
+b3 = displayio.Bitmap(320, 240, 65536)
+
+bitmaptools.dither(b3, b1, c)
+_bmp16.writebmp16(f"dither-atkinson.bmp", b3)
+bitmaptools.dither(b3, b1, c, bitmaptools.DitherAlgorithm.FloydStenberg)
+_bmp16.writebmp16(f"dither-floydstenberg.bmp", b3)

tests/circuitpython-manual/dither.py

@@ -1,31 +0,0 @@
-import bitmaptools
-import displayio
-import _bmp16
-
-if "/" in __file__:
-    here = __file__.rsplit("/", 1)[0]
-else:
-    here = "."
-
-c = displayio.Colorspace.BGR565
-
-b1 = _bmp16.loadbmp16(here + "/minerva16.bmp")
-b3 = displayio.Bitmap(320, 240, 65536)
-
-for i in (
-    0,
-    1 / 64,
-    3 / 64,
-    3 / 32,
-    3 / 16,
-    0.5,
-    1 - 3 / 16,
-    1 - 3 / 32,
-    1 - 3 / 64,
-    1 - 1 / 64,
-    1,
-):
-    bitmaptools.dither(b3, b1, c)
-    _bmp16.writebmp16(f"dither-atkinson.bmp", b3)
-    bitmaptools.dither(b3, b1, c, bitmaptools.DitherAlgorithm.FloydStenberg)
-    _bmp16.writebmp16(f"dither-floydstenberg.bmp", b3)