Implement Cobra CLI tooling, Viper config tooling (#336)

* start pulling out + replacing urfave and config

* replace many many instances of config

* move more stuff => viper

* properly remove urfave

* move some flags to root command

* add testrig commands to root

* alias config file keys

* start adding cli parsing tests

* reorder viper init

* remove config path alias

* fmt

* change config file keys to non-nested

* we're more or less in business now

* tidy up the common func

* go fmt

* get tests passing again

* add note about the cliparsing tests

* reorganize

* update docs with changes

* structure cmd dir better

* rename + move some files around

* fix dangling comma

internal/federation/federatingdb/db.go

@@ -25,7 +25,6 @@ import (
 
 	"github.com/superseriousbusiness/activity/pub"
 	"github.com/superseriousbusiness/activity/streams/vocab"
-	"github.com/superseriousbusiness/gotosocial/internal/config"
 	"github.com/superseriousbusiness/gotosocial/internal/db"
 	"github.com/superseriousbusiness/gotosocial/internal/typeutils"
 )
@@ -46,19 +45,17 @@ type federatingDB struct {
 	locks         map[string]*mutex
 	pool          sync.Pool
 	db            db.DB
-	config        *config.Config
 	typeConverter typeutils.TypeConverter
 }
 
 // New returns a DB interface using the given database and config
-func New(db db.DB, config *config.Config) DB {
+func New(db db.DB) DB {
 	fdb := federatingDB{
 		mutex:         sync.Mutex{},
 		locks:         make(map[string]*mutex, 100),
 		pool:          sync.Pool{New: func() interface{} { return &mutex{} }},
 		db:            db,
-		config:        config,
-		typeConverter: typeutils.NewConverter(config, db),
+		typeConverter: typeutils.NewConverter(db),
 	}
 	go fdb.cleanupLocks()
 	return &fdb