Update .gitignore to include some common temporary files that shouldn…

…'t be tracked by git (#829)

Ignore clangd settings, dfp viz output, and saved benchmark data

Authors:
  - David Gardner (https://github.com/dagardner-nv)

Approvers:
  - Michael Demoret (https://github.com/mdemoret-nv)

URL: #829

.gitignore

@@ -205,3 +205,13 @@ morpheus/_lib/**/*.pyi
 # Explicitly ignore .vscode/. Shared settings should go in morpheus.code-workspace
 # and user settings will go in .vscode/
 .vscode/
+
+# Ignore user-defined clangd settings
+.clangd
+
+# Ignore DFP Visualization output dirs
+examples/digital_fingerprinting/visualization/*-dfp-output/
+
+# Ignore saved benchmark data
+tests/benchmarks/.benchmarks/
+