.gitattributes & doc directory

- Added gitattributes for linguist exclusions
- Created empty doc folder for local working docs

.gitattributes

@@ -1 +1,7 @@
 * text=auto eol=lf
+lvglh/* linguist-vendored
+.vscode/* linguist-vendored
+lib/* linguist-generated
+release/* linguist-generated
+iso/* linguist-generated
+*.asm linguist-detectable

.gitignore

@@ -15,3 +15,4 @@ localenv.json
 dockerout.txt
 AGENTS.md
 *.log
+/doc/*.md