Add some more cross-references to PSR pages

Author: vdelau

source/_psr/psr-0-meta.twig

@@ -4,7 +4,7 @@ permalink: /psr/psr-0/meta
 title: 'PSR-0 Meta Document'
 markdown_source: fig-standards/accepted/PSR-0.md
 related:
-    - { name: 'PSR-0: Autoloading Standard', permalink: /psr/psr-0/ }
+    - { name: 'PSR-0: Autoloading Standard (deprecated)', permalink: /psr/psr-0/ }
     - { name: 'PSR-4: Autoloading Standard', permalink: /psr/psr-4/ }
     - { name: 'PSR-0 Meta Document' }
 ---

source/_psr/psr-12-extended-coding-style-meta.twig

@@ -5,6 +5,7 @@ title: 'PSR-12: Extended Coding Style'
 markdown_source: fig-standards/accepted/PSR-12-extended-coding-style-guide-meta.md
 related:
     - { name: 'PSR-12: Extended Coding Style', permalink: /psr/psr-12/ }
+    - { name: 'PER Coding Style: /per/coding-style/ }
     - { name: 'PSR-12 Meta Document' }
 ---
 

source/_psr/psr-12-extended-coding-style.twig

@@ -5,6 +5,7 @@ title: 'PSR-12: Extended Coding Style'
 markdown_source: fig-standards/accepted/PSR-12-extended-coding-style-guide.md
 related:
     - { name: 'PSR-12: Extended Coding Style' }
+    - { name: 'PER Coding Style: /per/coding-style/ }
     - { name: 'PSR-12 Meta Document', permalink: /psr/psr-12/meta }
 ---
 

source/_psr/psr-2-coding-style-guide-meta.twig

@@ -6,6 +6,7 @@ markdown_source: fig-standards/accepted/PSR-2-coding-style-guide-meta.md
 related:
     - { name: 'PSR-2: Coding Style Guide', permalink: /psr/psr-2/ }
     - { name: 'PSR-12: Extended Coding Style', permalink: /psr/psr-12/ }
+    - { name: 'PER Coding Style: /per/coding-style/ }
     - { name: 'PSR-2 Meta Document' }
 ---
 

source/_psr/psr-2-coding-style-guide.twig

@@ -6,6 +6,7 @@ markdown_source: fig-standards/accepted/PSR-2-coding-style-guide.md
 related:
     - { name: 'PSR-2: Coding Style Guide' }
     - { name: 'PSR-12: Extended Coding Style', permalink: /psr/psr-12/ }
+    - { name: 'PER Coding Style: /per/coding-style/ }
     - { name: 'PSR-2 Meta Document', permalink: /psr/psr-2/meta }
 ---