chore: add standard gitignore patterns

Add .gitignore patterns for:
- Fish
- Linux

Generated using the gitignore.io API.

.gitignore

@@ -1,3 +1,26 @@
+# GitIgnore for Fish-config
+
+### Fish ###
+fishd.*
+fish_history
+fish_variables
+config.local.fish
+
+### Linux ###
+*~
+
+# temporary files which can be created if a process still has a handle open of a deleted file
+.fuse_hidden*
+
+# KDE directory preferences
+.directory
+
+# Linux trash folder which might appear on any partition or disk
+.Trash-*
+
+# .nfs files are created when an open file is removed but is still being accessed
+.nfs*
+
 # Debug Files/Folders
 OLD/
 *.OLD