git: Various style fixes everywhere, removing whitespaces (#321)

* repo-wide: trim trailing spaces

Note: This doesn't touch the .tbl files in encodings/ since they include
meaningful trailing spaces (`20= `)

* patterns: clean up duplicate semicolons

* ELF: add header magic check

* glTF: use type::Magic for magic value

* glTF: check that the file size in the header matches

* xgstexture: fix generics syntax for magic value

* JPEG: define hex enum with 0x00 instead of 0X00

* CI: update deprecated actions

---------

Co-authored-by: Nik <werwolv98@gmail.com>

patterns/lua52.hexpat

@@ -10,11 +10,11 @@ namespace impl {
         }
         return std::format("\"{}\"", string.data);
     };
-    
+
     fn format_Constant(auto constant) {
        return constant.data;
     };
-    
+
     fn format_Version(auto ver) {
        return std::format("Ver. {}.{}", ver.major, ver.minor);
     };