Implement storedevs, prepare to port littlefs

kernel/fs/littlefs/.gitignore

@@ -0,0 +1,34 @@
+# Compilation output
+*.o
+*.d
+*.a
+*.ci
+*.csv
+*.t.*
+*.b.*
+*.gcno
+*.gcda
+*.perf
+lfs
+liblfs.a
+
+# Testing things
+runners/test_runner
+runners/bench_runner
+lfs.code.csv
+lfs.data.csv
+lfs.stack.csv
+lfs.structs.csv
+lfs.cov.csv
+lfs.perf.csv
+lfs.perfbd.csv
+lfs.test.csv
+lfs.bench.csv
+
+# Misc
+tags
+.gdb_history
+scripts/__pycache__
+
+# Historical, probably should remove at some point
+tests/*.toml.*