Update .gitignore to make it friendly to some users (#1337)

Add rules to avoid tracking files generated by the development
environment

Author: fegin

.gitignore

@@ -6,6 +6,7 @@ build
 outputs
 dist/*
 .vscode
+.vs
 
 # data
 data
@@ -20,3 +21,18 @@ torchtitan/experiments/flux/assets/*
 *.log
 error.json
 _remote_module_non_scriptable.py
+
+# Editor temporaries (VIM)
+[._]*.s[a-v][a-z]
+[._]*.sw[a-p]
+[._]s[a-rt-v][a-z]
+[._]ss[a-gi-z]
+[._]sw[a-p]
+Session.vim
+Sessionx.vim
+.netrwhist
+*~
+.~lock.*
+
+# macOS dir files
+.DS_Store