chore: add .gitignore

.gitignore

@@ -0,0 +1,25 @@
+*.o
+*.a
+*.so
+_obj
+_test
+*.[568vq]
+[568vq].out
+*.cgo1.go
+*.cgo2.c
+_cgo_defun.c
+_cgo_gotypes.go
+_cgo_export.*
+_testmain.go
+*.exe
+*.test
+*.prof
+vendor/
+/hg612-exporter
+cover.out
+cover.html
+*.coverprofile
+testoutput.log
+.vscode
+.DS_Store
+.history