Add Iskra integration (#121488)

* Add iskra integration

* iskra non resettable counters naming fix

* added iskra config_flow test

* fixed iskra integration according to code review

* changed iskra config flow test

* iskra integration, fixed codeowners

* Removed counters code & minor fixes

* added comment

* Update homeassistant/components/iskra/__init__.py

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

* Updated Iskra integration according to review

* Update homeassistant/components/iskra/strings.json

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

* Updated iskra integration according to review

* minor iskra integration change

* iskra integration changes according to review

* iskra integration changes according to review

* Changed iskra integration according to review

* added iskra config_flow range validation

* Fixed tests for iskra integration

* Update homeassistant/components/iskra/coordinator.py

* Update homeassistant/components/iskra/config_flow.py

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

* Fixed iskra integration according to review

* Changed voluptuous schema for iskra integration and added data_descriptions

* Iskra integration tests lint error fix

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

homeassistant/generated/config_flows.py

@@ -285,6 +285,7 @@ FLOWS = {
         "ipp",
         "iqvia",
         "iron_os",
+        "iskra",
         "islamic_prayer_times",
         "israel_rail",
         "iss",