Rename sync cmd to reconcile

.github/workflows/e2e.yaml

cmd/tk/main.go

cmd/tk/reconcile.go

cmd/tk/reconcile_kustomization.go

cmd/tk/reconcile_source.go

cmd/tk/reconcile_source_git.go

docs/cmd/tk.md

docs/cmd/tk_reconcile.md

docs/cmd/tk_reconcile_kustomization.md

docs/cmd/tk_reconcile_source.md

docs/cmd/tk_reconcile_source_git.md

docs/get-started/index.md

go.mod

go.sum

mkdocs.yml