Language support across GitHub products (#18677)

* Update content

* Create github-language-support.md

* Add reminder HTML comments

* Add link to supported languages article

* Add intro for GitHub's products

* Add note to list of CodeQL supported languages

* table with package managers

* Update table and add conceptual info

* Versioning to fix broken links

* Fix table layout

* Add package managers to table

* Fix versioning syntax

* Incorporate reviewer feedback

* Center table headers

* Update Dependabot features in table

* Add footnote for third-party code scanning support

* Update link

* support native markdown table alignments

* Update links for ghes2.22

* Use proper names of package managers

* Add Scala

* Adjust conceptual info

* Flip table axes

* Delete unused reusables

* Update link to Packages info

* fix merge conflict

* fix other merge conflict

* Update codeql-languages-bullets.md

* Revert "Update codeql-languages-bullets.md"

This reverts commit 69547205f5e43a8fbf3edc51c89f0f647eef285a.

* Update article topic to sentence case

Co-authored-by: Sarah Schneider <sarahs@github.com>

content/github/getting-started-with-github/github-language-support.md

@@ -0,0 +1,38 @@
+---
+title: GitHub language support
+intro: 'An overview of the programming languages supported by {% data variables.product.prodname_dotcom %} features.'
+versions:
+  free-pro-team: '*'
+  enterprise-server: '>=2.22'
+  github-ae: '*'
+topics:
+  - GitHub
+---
+<!-- If you make changes to this article, also update any feature-level articles to reflect the same changes in language support. -->
+
+### About supported languages
+
+Most {% data variables.product.prodname_dotcom %} features work regardless of which languages your code is written in. You can search for code or enable syntax highlighting based on any language known to {% data variables.product.prodname_dotcom %}. For more information, see "[Searching code](/github/searching-for-information-on-github/searching-code#search-by-language)" or "[Creating and highlighting code blocks](/github/writing-on-github/creating-and-highlighting-code-blocks#syntax-highlighting)."
+
+Some {% data variables.product.prodname_dotcom %} products have features that are currently only supported for a subset of programming languages.
+
+### Core languages supported by {% data variables.product.prodname_dotcom %} features
+
+Core languages for {% data variables.product.prodname_dotcom %} features include C, C++, C#, Go, Java, JavaScript, PHP, Python, Ruby, Scala, and TypeScript. For features that support package managers, the currently supported package managers are included in the table with their relevant languages.
+
+Some features are supported for additional languages or package managers. If you want to know whether another language is supported for a feature or to request support for a language, visit the [Community Forum](https://github.community/).
+
+| Language {% data reusables.supported-languages.products-table-header %}
+{% data reusables.supported-languages.C %}
+{% data reusables.supported-languages.Cpp %}
+{% data reusables.supported-languages.Cs %}
+{% data reusables.supported-languages.go %}
+{% data reusables.supported-languages.java %}
+{% data reusables.supported-languages.javascript %}
+{% data reusables.supported-languages.php %}
+{% data reusables.supported-languages.python %}
+{% data reusables.supported-languages.ruby %}
+{% data reusables.supported-languages.scala %}
+{% data reusables.supported-languages.typescript %}
+
+[1] These languages are supported for {% data variables.product.prodname_code_scanning %} by third-party actions.