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

i18n/en.yaml

@@ -1,73 +1,46 @@
-toggleMenu:
-    other: Toggle Menu
+toggleMenu: Toggle Menu
 
-darkMode:
-    other: Dark Mode
+darkMode: Dark Mode
 
 list:
     page:
         one: "{{ .Count }} page"
         other: "{{ .Count }} pages"
-
-    section:
-        other: Section
-
+    section: Section
     subsection:
         one: Subsection
         other: Subsections
 
 article:
-    back:
-        other: Back
-
-    tableOfContents:
-        other: Table of contents
-
-    relatedContent:
-        other: Related content
-
-    lastUpdatedOn:
-        other: Last updated on
-
+    back: Back
+    tableOfContents: Table of contents
+    relatedContent: Related content
+    lastUpdatedOn: Last updated on
     readingTime:
         one: "{{ .Count }} minute read"
         other: "{{ .Count }} minute read"
+    codeblock:
+        copy: Copy
+        copied: Copied!
 
 notFound:
-    title:
-        other: Not Found
-
-    subtitle:
-        other: This page does not exist
+    title: Not Found
+    subtitle: This page does not exist
 
 widget:
     archives:
-        title:
-            other: Archives
-
-        more:
-            other: More
-
+        title: Archives
+        more: More
     tagCloud:
-        title:
-            other: Tags
+        title: Tags
     categoriesCloud:
-        title:
-            other: Categories
+        title: Categories
 
 search:
-    title:
-        other: Search
-
-    placeholder:
-        other: Type something...
-
-    resultTitle:
-        other: "#PAGES_COUNT pages (#TIME_SECONDS seconds)"
+    title: Search
+    placeholder: Type something...
+    resultTitle: "#PAGES_COUNT pages (#TIME_SECONDS seconds)"
 
 footer:
-    builtWith:
-        other: Built with {{ .Generator }}
-
-    designedBy:
-        other: Theme {{ .Theme }} designed by {{ .DesignedBy }}
+    builtWith: Built with {{ .Generator }}
+    designedBy: Theme {{ .Theme }} designed by {{ .DesignedBy }}