feat: add GitHub, Telegram, Steam to lists + .service/hosts + PROJECT.md

docs: rewrite README.md with 8 distro install guides
fix: hosts_update now reads local .service/hosts and appends to /etc/hosts

lists/list-general.txt

@@ -47,3 +47,26 @@ betterttv.net
 7tv.io
 localizeapi.com
 klipy.com
+github.com
+github.io
+raw.githubusercontent.com
+release-assets.githubusercontent.com
+private-user-images.githubusercontent.com
+avatars.githubusercontent.com
+gist.github.com
+steampowered.com
+steamcommunity.com
+steamcontent.com
+steamstatic.com
+t.me
+telegram.org
+telegram.me
+telegram.dog
+telegram.space
+telesco.pe
+tg.dev
+api.telegram.org
+td.telegram.org
+web.telegram.org
+my.telegram.org
+oauth.telegram.org