Enforce LF line endings via .gitattributes + ignore tauri-icon's extra outputs

Fixes the recurring 'Your local changes to Cargo.toml would be overwritten'
error on Windows pulls. Git-for-Windows defaults to core.autocrlf=true,
which made every text file appear modified vs the LF-stored versions.
'* text=auto eol=lf' in .gitattributes overrides autocrlf and forces a
stable LF checkout.

Also ignores Square*Logo.png, android/, ios/, 64x64.png, icon.png — these
are produced by 'pnpm tauri icon' but we ship only the canonical 5 files
(32, 128, 128@2x, .ico, .icns).

.gitattributes

@@ -0,0 +1,42 @@
+# Always check out source files with LF endings, regardless of the user's
+# core.autocrlf setting. Without this, Windows clones with core.autocrlf=true
+# (the Git-for-Windows default) treat every text file as "modified" because
+# Git's stored version is LF but the working copy is CRLF.
+
+* text=auto eol=lf
+
+# Explicit text files (belt-and-suspenders).
+*.rs       text eol=lf
+*.toml     text eol=lf
+*.json     text eol=lf
+*.ts       text eol=lf
+*.tsx      text eol=lf
+*.js       text eol=lf
+*.svelte   text eol=lf
+*.css      text eol=lf
+*.html     text eol=lf
+*.md       text eol=lf
+*.yml      text eol=lf
+*.yaml     text eol=lf
+
+# Shell + Windows scripts keep their native endings.
+*.sh       text eol=lf
+*.ps1      text eol=crlf
+*.bat      text eol=crlf
+*.cmd      text eol=crlf
+
+# Binaries — never touch these.
+*.png      binary
+*.ico      binary
+*.icns     binary
+*.jpg      binary
+*.jpeg     binary
+*.gif      binary
+*.exe      binary
+*.dll      binary
+*.so       binary
+*.dylib    binary
+*.woff     binary
+*.woff2    binary
+*.ttf      binary
+*.otf      binary