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/vgm.hexpat

@@ -18,9 +18,9 @@ bitfield VGMVersion {
     bugfix : 4;
     minor : 4;
     major : 24;
-    
+
     versionValue = major * 100 + minor * 10 + bugfix;
-    
+
 } [[format("format_VGMVersion")]];
 
 fn format_VGMVersion(auto version) {
@@ -224,7 +224,7 @@ struct ExtraHeader {
     u32 chpClkOffset;
     chpVolBase = $;
     u32 chpVolOffset;
-    
+
     if (chpClkOffset > 0) {
         $ = chpClkBase + chpClkOffset;
         chpClkHeader chpClk;
@@ -232,7 +232,7 @@ struct ExtraHeader {
         $ = chpVolBase + chpVolOffset;
         chpVolHeader chpVol;
     }
-    
+
 };
 
 struct VGM {