chore: add .editorconfig and .gitattributes

Add editor configuration and line ending normalization
for consistent development across platforms.

Signed-off-by: Srikanth Patchava <srpatcha@users.noreply.github.com>
Signed-off-by: Khem Raj <khem.raj@oss.qualcomm.com>

.editorconfig

@@ -0,0 +1,23 @@
+root = true
+
+[*]
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+charset = utf-8
+indent_style = space
+indent_size = 4
+
+[Makefile]
+indent_style = tab
+
+[*.md]
+trim_trailing_whitespace = false
+
+[*.{patch,diff}]
+end_of_line = unset
+insert_final_newline = unset
+trim_trailing_whitespace = unset
+charset = unset
+indent_style = unset
+indent_size = unset