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

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

includes/std/ptr.pat

@@ -57,7 +57,7 @@ namespace auto std::ptr {
         // `pointerValue` is `no_unique_address` because we don't want to advance
         // the current memory location after reading the value of the pointer itself;
         // we want to examine the value at this address to determine what should be
-        // displayed. It's also `hidden` so the editor only displays either thee 
+        // displayed. It's also `hidden` so the editor only displays either thee
         // padding or the populated pointer/pointee field.
         PointerTy pointerValue [[no_unique_address, hidden]];
         if (pointerValue == 0x0) {