(enh) New 3rd party Language Grammar: Pine Script (#3428)

Author: jeyllani

CHANGES.md

@@ -1,5 +1,9 @@
 ## Version 11.4 (most likely)
 
+New Language:
+
+- Added 3rd party Pine Script grammar to SUPPORTED_LANGUAGES [Jeylani B][]
+
 Themes:
 
 - `Default` is now much closer WCAG AA (contrast) (#3402) [Josh Goebel]
@@ -41,6 +45,7 @@ Themes:
 
 - Modified background color in css for Gradient Light and Gradient Dark themes [Samia Ali][]
 
+[Jeylani B]: https://github.com/jeyllani
 [Richard Gibson]: https://github.com/gibson042
 [Bradley Mackey]: https://github.com/bradleymackey
 [Melvyn Laïly]: https://github.com/mlaily

SUPPORTED_LANGUAGES.md

@@ -146,6 +146,7 @@ The table below shows the full list of languages (and corresponding classes/alia
 | Papyrus                 | papyrus, psc           |[highlightjs-papyrus](https://github.com/Pickysaurus/highlightjs-papyrus)    |
 | Parser3                 | parser3                |         |
 | Perl                    | perl, pl, pm           |         |
+| Pine Script             | pine, pinescript       | [highlightjs-pine](https://github.com/jeyllani/highlightjs-pine) |
 | Plaintext               | plaintext, txt, text   |         |
 | Pony                    | pony                   |         |
 | PostgreSQL & PL/pgSQL   | pgsql, postgres, postgresql |    |