Transaction status subscription (#748)

* stream and unit tests

* working subscriptions

* fix snapshots

* check for submitted after finalized status

* refactor status channels and move status trigger to tx pool

* fix pin

* Update fuel-core-interfaces/src/txpool.rs

Co-authored-by: Brandon Kite <brandonkite92@gmail.com>

* Update fuel-client/src/client.rs

Co-authored-by: Green Baneling <XgreenX9999@gmail.com>

* update docs for squeezed out

* fix test

* fix timestamps

* fix schema

Co-authored-by: Brandon Kite <brandonkite92@gmail.com>
Co-authored-by: Green Baneling <XgreenX9999@gmail.com>

.gitignore

@@ -3,4 +3,6 @@
 .terraform
 *.tfstate*
 *.terraform.lock.hcl*
-.vscode
+.vscode
+.cov
+lcov.info