Localization instructions (#9192)

* Begin re-working localization instructions

* Fix dangling sentence

* Re-arrange sections plus new content

* Fix TOC issue with misplaced capture directive

* Create new shortcodes for versions and language repos

* Add more translation instructions

* Remove translation docs added as an example

* Finish draft of localization doc

* Remove extraneous note

layouts/shortcodes/language-repos-list.html

@@ -0,0 +1,38 @@
+{{- $languages := .Site.Home.AllTranslations }}
+<table>
+    <thead>
+        <tr>
+            <th>
+                Language
+            </th>
+            <th>
+                Language code
+            </th>
+            <th>
+                Repository
+            </th>
+        </tr>
+    </thead>
+    <tbody>
+        {{- range $languages.ByWeight }}
+        {{- $name := .Language.LanguageName }}
+        {{- $code := string .Language }}
+        {{- $repo := printf "https://github.com/%s" (index .Site.Data.repos $code) }}
+        <tr>
+            <td>
+                <a href="{{ .Permalink }}">
+                    {{ $name }}
+                </a>
+            </td>
+            <td>
+                <code>{{ $code }}</code>
+            </td>
+            <td>
+                <a href="{{ $repo }}">
+                    {{ $repo }}
+                </a>
+            </td>
+        </tr>
+        {{- end }}
+    </tbody>
+</table>

layouts/shortcodes/latest-version.html

@@ -0,0 +1 @@
+{{ .Site.Params.latest }}

layouts/shortcodes/release-branch.html

@@ -0,0 +1,3 @@
+{{- $latestVersion := .Site.Params.latest }}
+{{- $latestReleaseBranch := printf "release-%s" (replace $latestVersion "v" "") }}
+{{- $latestReleaseBranch }}