spec(web): add jekyll website

spec/web/site/_data/contact.yml

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+#  The contact options.
+
+- type: git
+  icon: "fab fa-git-alt"
+  url: "https://src.514fpv.io:2096/koishi"
+
+- type: mastodon
+  icon: "fab fa-mastodon"
+  url:  ""
+
+#- type: github
+#  icon: "fab fa-github"
+#
+#- type: twitter
+#  icon: "fa-brands fa-x-twitter"
+
+- type: email
+  icon: "fas fa-envelope"
+  noblank: true
+
+- type: rss
+  icon: "fas fa-rss"
+  noblank: true
+
+

spec/web/site/_data/locales/en.yml

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+meta: '<a href="https://src.514fpv.io:2096/koishi/nixos/src/branch/master/spec/web/site" target="_blank">Source code</a>'

spec/web/site/_data/share.yml

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+#  Sharing options at the bottom of the post.
+#  Icons from <https://fontawesome.com/>
+
+platforms:
+  - type: Twitter
+    icon: "fa-brands fa-square-x-twitter"
+    link: "https://twitter.com/intent/tweet?text=TITLE&url=URL"
+
+  - type: Facebook
+    icon: "fab fa-facebook-square"
+    link: "https://www.facebook.com/sharer/sharer.php?title=TITLE&u=URL"
+
+  - type: Telegram
+    icon: "fab fa-telegram"
+    link: "https://t.me/share/url?url=URL&text=TITLE"
+
+  - type: Linkedin
+    icon: "fab fa-linkedin"
+    link: "https://www.linkedin.com/sharing/share-offsite/?url=URL"
+
+  - type: Weibo
+    icon: "fab fa-weibo"
+    link: "http://service.weibo.com/share/share.php?title=TITLE&url=URL"