screenshot (github top 50) and statistics charts support in website output

game engines now counted as frameworks
few additions

entries/netradiant-custom.md

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+# NetRadiant-custom
+
+- Home: https://garux.github.io/NRC/
+- State: mature
+- Download: https://github.com/Garux/netradiant-custom/releases
+- Platform: Windows, Linux
+- Keyword: tool
+- Code repository: https://github.com/Garux/netradiant-custom.git
+- Code language: C++, C
+- Code license: GPL-2.0
+
+Level editor for id Tech based games.
+
+## Building
+
+- Build system: Make