add .swp files to gitignore

created by vim and nano text editors

Author: shiltemann

src/FileSystem/DefaultGitignore.fs

@@ -49,6 +49,7 @@ $RECYCLE.BIN/
 # Windows shortcuts
 *.lnk
 # ----- linux rules -----
+*.swp
 # taken from https://github.com/github/gitignore/blob/main/Global/Linux.gitignore
 *~
 # temporary files which can be created if a process still has a handle open of a deleted file
@@ -59,4 +60,4 @@ $RECYCLE.BIN/
 .Trash-*
 # .nfs files are created when an open file is removed but is still being accessed
 .nfs*
-"""
+"""