[ImgBot] Optimize images (#595)

*Total -- 111.97kb -> 83.53kb (25.4%)

/resources/readme_icon_plans.png -- 12.06kb -> 6.96kb (42.31%)
/resources/readme_icon_disclaimer.png -- 11.37kb -> 6.91kb (39.23%)
/resources/readme_icon_acknowledgements.png -- 10.60kb -> 6.87kb (35.18%)
/resources/readme_icon_install.png -- 10.17kb -> 6.64kb (34.74%)
/resources/readme_icon_features.png -- 8.26kb -> 5.61kb (32.01%)
/resources/readme_icon_progress.png -- 6.03kb -> 4.37kb (27.48%)
/resources/readme_icon_github.png -- 17.34kb -> 14.38kb (17.04%)
/resources/readme_icon_donate.png -- 12.06kb -> 10.04kb (16.81%)
/resources/readme_icon_community.png -- 13.86kb -> 11.56kb (16.6%)
/resources/readme-ja/VueTube.ja.dark.svg -- 9.27kb -> 9.24kb (0.34%)
/NUXT/static/home.svg -- 0.32kb -> 0.32kb (0.3%)
/NUXT/static/subs.svg -- 0.63kb -> 0.63kb (0.16%)

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Signed-off-by: ImgBotApp <ImgBotHelp@gmail.com>
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NUXT/static/home.svg

@@ -1 +1 @@
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NUXT/static/subs.svg

@@ -1 +1 @@
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