chore: add root .gitignore and editor settings

.gitignore

@@ -0,0 +1,43 @@
+# ===== Dependencies =====
+node_modules/
+**/node_modules/
+
+# ===== Build output =====
+dist/
+**/dist/
+build/
+out-tsc/
+.angular/
+**/.angular/
+*.tsbuildinfo
+
+# ===== Environment & secrets =====
+.env
+.env.local
+.env.*.local
+*.pem
+*.key
+
+# ===== Logs =====
+logs/
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# ===== OS / Editor junk =====
+.DS_Store
+Thumbs.db
+*.swp
+*.swo
+*~
+*.bak
+*.orig
+
+# ===== Coverage / test artifacts =====
+coverage/
+.nyc_output/
+
+# ===== Misc =====
+.cache/
+tmp/

.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+    "html.autoClosingTags": false
+}