separate integration ctrls from main ctrl

[#84659922]
routes for new ctrl

[#84659922]
add google integration feature flag

[#84659922]
add google integration to main#index view

[#84659922]
fix paths in main#index

[#84659922]
add application helper

[#84659922]
rename github helper

[#84659922]
move helper method from main to app helper

[#84659922]
move files around, rename

[#84659922]
remove namespaces... argh

[#84659922]
rename google helper

[#84659922]
move missing_teams template to github integration

[#84659922]
small fix