Add Hindi to languages and create category pages

Author: murchandamus

_config.yml

@@ -71,6 +71,8 @@ languages:
     name: Spanish
   - code: cs
     name: Czech
+  - code: hi
+    name: Hindi
 
 ## In-text aliases
 trb: "709,632" # TapRoot Block (activation)

hi/blog.md

@@ -0,0 +1,13 @@
+---
+layout: blog
+lang: hi
+title: Blog-hi
+name: blog-hi
+permalink: /hi/blog/
+share: false
+version: 1
+---
+
+_Would you like to help translate our publications? See the [CONTRIBUTING
+documentation](https://github.com/bitcoinops/bitcoinops.github.io/blob/master/CONTRIBUTING.md#translations)
+in our github repo._

hi/newsletters.md

@@ -0,0 +1,13 @@
+---
+layout: newsletters
+lang: hi
+title: Newsletters-hi
+name: newsletters-hi
+permalink: /hi/newsletters/
+share: false
+version: 1
+---
+
+_Would you like to help translate our publications? See the [CONTRIBUTING
+documentation](https://github.com/bitcoinops/bitcoinops.github.io/blob/master/CONTRIBUTING.md#translations)
+in our github repo._

hi/publications.md

@@ -0,0 +1,13 @@
+---
+layout: publications
+lang: hi
+title: Publications-hi
+name: publications-hi
+permalink: /hi/publications/
+share: false
+version: 1
+---
+
+_Would you like to help translate our publications? See the [CONTRIBUTING
+documentation](https://github.com/bitcoinops/bitcoinops.github.io/blob/master/CONTRIBUTING.md#translations)
+in our github repo._