Refactor .gitattributes and .gitignore

.gitattributes

@@ -1,11 +1,34 @@
-# No monkey business with line endings
-* -text
+# Auto detect text files and perform LF normalization
+* text eol=lf
 
-# hexdump binary files
-*.png  binary diff=hex
-*.lz   binary diff=hex
+# Explicitly declare text files you want to always be normalized and converted
+# to native line endings on checkout.
+
+# files part of the build
+*.asm text
+*.pal text
+*.link text
+*.txt text
+
+# extra files
+*.awk text
+*.c text
+*.h text
+*.MD text
+*.py text
+*.sh text
+*.sha1 text
+
+# Denote all files that are truly binary and should not be modified.
+*.png binary diff=hex
+*.lz.* binary diff=hex
+*.bin binary diff=hex
+*.blk binary diff=hex
+*.rle binary diff=hex
+*.attrmap binary diff=hex
+*.tilemap binary diff=hex
+
+# these are generated but just in case
+*.lz binary   diff=hex
 *.2bpp binary diff=hex
 *.1bpp binary diff=hex
-*.bin  binary diff=hex
-*.blk  binary diff=hex
-

.gitignore

@@ -17,6 +17,7 @@
 *.sgm
 *.sav
 *.rtc
+*.sn*
 
 # rgbds extras
 *.map