[ImgBot] Optimize images (#290)

* fix compression with icon/description

* Create FUNDING.yml

* [ImgBot] Optimize images

*Total -- 356.22kb -> 227.11kb (36.24%)

/examples/standalone/cpp_tireal_pi_montecarlo/screenshot.png -- 4.23kb -> 1.30kb (69.35%)
/examples/graphx/sprites_rotate_flip/screenshot.png -- 8.25kb -> 3.07kb (62.81%)
/examples/graphx/tilemap_fullscreen_appvar/screenshot.png -- 129.08kb -> 57.74kb (55.26%)
/examples/graphx/scaled_text/screenshot.png -- 1.31kb -> 0.61kb (53.4%)
/docs/libraries/images/graphx_sprites.png -- 54.31kb -> 27.97kb (48.49%)
/examples/graphx/hello_world/screenshot.png -- 0.73kb -> 0.40kb (44.79%)
/examples/graphx/sprites/screenshot.png -- 1.16kb -> 0.70kb (40.07%)
/examples/graphx/sprites_rlet/screenshot.png -- 3.28kb -> 2.16kb (34.05%)
/examples/graphx/sprites_scaled/screenshot.png -- 1.40kb -> 0.96kb (31.45%)
/examples/standalone/cpp_tireal_test/screenshot.png -- 2.47kb -> 1.72kb (30.45%)
/examples/hello_world/screenshot.png -- 1.31kb -> 0.93kb (28.92%)
/docs/libraries/images/graphx_buffer.png -- 21.52kb -> 15.43kb (28.32%)
/docs/static/images/hello_world.png -- 24.35kb -> 17.67kb (27.43%)
/examples/graphx/text_flipped/screenshot.png -- 0.55kb -> 0.45kb (18.86%)
/examples/standalone/second_counter2/screenshot.gif -- 4.05kb -> 3.32kb (17.95%)
/examples/keypadc/multiple_keys/screenshot.gif -- 5.37kb -> 4.64kb (13.54%)
/examples/standalone/lcd_fill/screenshot.gif -- 6.32kb -> 5.62kb (11.12%)
/examples/graphx/sprites_rotate_scale/src/gfx/star.png -- 2.30kb -> 2.06kb (10.68%)
/examples/graphx/sprites_rotate_flip/src/gfx/star.png -- 2.30kb -> 2.06kb (10.68%)
/examples/keypadc/single_keys/screenshot.gif -- 6.70kb -> 6.00kb (10.5%)
/examples/standalone/real_time_clock/screenshot.gif -- 9.03kb -> 8.33kb (7.78%)
/examples/graphx/lighten_darken/screenshot.gif -- 66.20kb -> 63.98kb (3.34%)

Signed-off-by: ImgBotApp <ImgBotHelp@gmail.com>

Co-authored-by: Adrien Bertrand <bertrand.adrien@gmail.com>
Co-authored-by: mateoconlechuga <matthewwaltzis@gmail.com>
Co-authored-by: ImgBotApp <ImgBotHelp@gmail.com>

Author: 4 people