Merge branch 'canary' into master (#711)

* refactor(i18n): simplify the structure of the translation file

* chore: prepare repository for v4.0.0-alpha

* chore: modify go.mod to v4

* refactor: migrate theme configuration to TOML

* fix: exampleSite not using correct theme

* feat: add favicon from assets folder

* refactor: drop linear grandient background feature

remove node-vibrant from dependencies

* feat: use Hugo's code block render hook to implement code copy button

Now it can have i18n support

* refactor: delete color.ts

* refactor: delete Emoji support post from example site

* refactor: drop support for `hidden` field in front matter

* feat: upgrade to PhotoSwipe v5

* chore: bump the required hugo version to 0.100.0

* refactor: remove PhotoSwipe from external.yaml

* fix: extra margin in search result

* fix: incorrect markdown heading level in example site

* refactor: remove some usages of `default` in template

No longer needed thanks to Hugo's configuration merge

* fix: one line codeblock style in firefox

closes https://github.com/CaiJimmy/hugo-theme-stack/issues/564

* feat: add style to new codeblock

* feat: i18n support for codeblock copy text

* fix(menu): jitter when closing menu

It's caused by flexbox gap property, which can't animate

* fix(search): long text overflows under the Search icon

closes https://github.com/CaiJimmy/hugo-theme-stack/issues/515

data/external.yaml

@@ -1,25 +1,3 @@
-Vibrant:
-    - src: https://cdn.jsdelivr.net/npm/node-vibrant@3.1.6/dist/vibrant.min.js
-      integrity: sha256-awcR2jno4kI5X0zL8ex0vi2z+KMkF24hUW8WePSA9HM=
-      type: script
-
-PhotoSwipe:
-    - src: https://cdn.jsdelivr.net/npm/photoswipe@4.1.3/dist/photoswipe.min.js
-      integrity: sha256-ePwmChbbvXbsO02lbM3HoHbSHTHFAeChekF1xKJdleo=
-      type: script
-      defer: true
-
-    - src: https://cdn.jsdelivr.net/npm/photoswipe@4.1.3/dist/photoswipe-ui-default.min.js
-      integrity: sha256-UKkzOn/w1mBxRmLLGrSeyB4e1xbrp4xylgAWb3M42pU=
-      type: script
-      defer: true
-
-    - src: https://cdn.jsdelivr.net/npm/photoswipe@4.1.3/dist/default-skin/default-skin.min.css
-      type: style
-
-    - src: https://cdn.jsdelivr.net/npm/photoswipe@4.1.3/dist/photoswipe.min.css
-      type: style
-
 KaTeX:
     - src: https://cdn.jsdelivr.net/npm/katex@0.15.6/dist/katex.min.css
       integrity: sha256-J+iAE0sgH8QSz9hpcDxXIftnj65JEZgNhGcgReTTK9s=