Add SimpleFIN integration (#108336)

* reset to latest dev branch

* Update homeassistant/components/simplefin/sensor.py

Co-authored-by: Erik Montnemery <erik@montnemery.com>

* formatting tweak

* Removed info errors

* fix bad billing error message

* addressing PR

* addressing PR

* reauth abort and already_confiugred added to strings.json

* adding the reauth message

* ruff

* update reqs

* reset to latest dev branch

* Update homeassistant/components/simplefin/sensor.py

Co-authored-by: Erik Montnemery <erik@montnemery.com>

* formatting tweak

* Removed info errors

* fix bad billing error message

* addressing PR

* addressing PR

* reauth abort and already_confiugred added to strings.json

* adding the reauth message

* ruff

* update reqs

* Update homeassistant/components/simplefin/__init__.py

Co-authored-by: Joost Lekkerkerker <joostlek@outlook.com>

* Addressing a few PR comments - removing nix - and adding runtime data

* updated comments

* rename config flow

* pulling reauth :( - inline stuff

* inline more

* fixed a tab issue

* reverting changes

* various PR updates and code removal

* generator async add

* Update homeassistant/components/simplefin/__init__.py

Co-authored-by: Joost Lekkerkerker <joostlek@outlook.com>

* Update homeassistant/components/simplefin/config_flow.py

Co-authored-by: Joost Lekkerkerker <joostlek@outlook.com>

* Update homeassistant/components/simplefin/config_flow.py

Co-authored-by: Joost Lekkerkerker <joostlek@outlook.com>

* Update homeassistant/components/simplefin/sensor.py

Co-authored-by: Joost Lekkerkerker <joostlek@outlook.com>

* Update homeassistant/components/simplefin/sensor.py

Co-authored-by: Joost Lekkerkerker <joostlek@outlook.com>

* always callable

* Update homeassistant/components/simplefin/coordinator.py

Co-authored-by: Joost Lekkerkerker <joostlek@outlook.com>

* no-verify

* type

* fixing missing domain

* it looks like this file is gone now

* typing

* sorta pass

* fix license

* Update homeassistant/components/simplefin/config_flow.py

Co-authored-by: Joost Lekkerkerker <joostlek@outlook.com>

* Update homeassistant/components/simplefin/entity.py

Co-authored-by: Joost Lekkerkerker <joostlek@outlook.com>

* addressing PR

* Update homeassistant/components/simplefin/strings.json

Co-authored-by: Joost Lekkerkerker <joostlek@outlook.com>

* move property to entity.py

* moved stuff out to else block

* Initial Snappshot Testing ... still have unadressed changes to make

* Addressing PR Comments

* pushing back to joost

* removing non-needed file

* added more asserts

* reducing mocks - need to fix patch paths still

* Changed patch to be more localized to config_flow

* Removed unneeded fixture

* Moved coordinator around

* Cleaning up the code

* Removed a NOQA"

* Upping the number of asserts

* cleanup

* fixed abort call

* incremental update - for Josot... changed a function signature and removed an annotatoin

* no-verify

* Added an abort test

* ruff

* increased coverage but it might not pass muster for JOOST

* increased coverage but it might not pass muster for JOOST

* Much nicer test now

* tried to simplify

* Fix nits

---------

Co-authored-by: Erik Montnemery <erik@montnemery.com>
Co-authored-by: Joost Lekkerkerker <joostlek@outlook.com>

CODEOWNERS

@@ -1275,6 +1275,8 @@ build.json @home-assistant/supervisor
 /tests/components/sighthound/ @robmarkcole
 /homeassistant/components/signal_messenger/ @bbernhard
 /tests/components/signal_messenger/ @bbernhard
+/homeassistant/components/simplefin/ @scottg489 @jeeftor
+/tests/components/simplefin/ @scottg489 @jeeftor
 /homeassistant/components/simplepush/ @engrbm87
 /tests/components/simplepush/ @engrbm87
 /homeassistant/components/simplisafe/ @bachya