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/text/formatter.go

@@ -21,7 +21,6 @@ package text
 import (
 	"context"
 
-	"github.com/superseriousbusiness/gotosocial/internal/config"
 	"github.com/superseriousbusiness/gotosocial/internal/db"
 	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
 )
@@ -42,14 +41,12 @@ type Formatter interface {
 }
 
 type formatter struct {
-	cfg *config.Config
-	db  db.DB
+	db db.DB
 }
 
 // NewFormatter returns a new Formatter interface for parsing statuses and other text input into nice html.
-func NewFormatter(cfg *config.Config, db db.DB) Formatter {
+func NewFormatter(db db.DB) Formatter {
 	return &formatter{
-		cfg: cfg,
-		db:  db,
+		db: db,
 	}
 }