chore: add IDE and Git configuration

- Add VS Code workspace settings for consistent development experience
- Add VS Code extension recommendations (ESLint, Prettier, EditorConfig)
- Add .gitattributes to enforce LF line endings

.gitattributes

@@ -0,0 +1,36 @@
+# Auto detect text files and perform LF normalization
+* text=auto eol=lf
+
+# Source code
+*.js text eol=lf
+*.jsx text eol=lf
+*.ts text eol=lf
+*.tsx text eol=lf
+*.json text eol=lf
+*.css text eol=lf
+*.scss text eol=lf
+*.html text eol=lf
+*.md text eol=lf
+*.yaml text eol=lf
+*.yml text eol=lf
+
+# Scripts
+*.sh text eol=lf
+*.bash text eol=lf
+
+# Windows scripts should use CRLF
+*.bat text eol=crlf
+*.cmd text eol=crlf
+*.ps1 text eol=crlf
+
+# Binary files
+*.png binary
+*.jpg binary
+*.jpeg binary
+*.gif binary
+*.ico binary
+*.svg binary
+*.woff binary
+*.woff2 binary
+*.ttf binary
+*.eot binary