feat: make page responsive

src/js/components/Link/Link.js

src/js/components/Link/Link.module.scss

src/js/components/TopLinks/TopLinks.module.scss

src/js/pages/MainPage,module.scss

src/js/pages/MainPage.js

src/js/sections/BottomSection/BottomSection.module.scss

src/js/sections/CloudSection/CloudSection.module.scss

src/js/sections/FeatureSection/FeatureSection.js

src/js/sections/FeatureSection/FeatureSection.module.scss

src/js/sections/LandingSection/LandingSection.js

src/js/sections/LandingSection/LandingSection.module.scss

src/js/sections/OctopusSection/OctopusSection.js

src/js/sections/OctopusSection/OctopusSection.module.scss

src/js/sections/StatsSection/StatsSection.js

src/js/sections/StatsSection/StatsSection.module.scss

src/js/sections/TowerSection/TowerSection.js

src/js/sections/TowerSection/TowerSection.module.scss

src/js/sections/VscodeSection/VscodeSection.js

src/js/sections/VscodeSection/VscodeSection.module.scss