chore: use the same .golangci.yml as the runner & gofumpt over gofmt (#206)

To prepare for a smooth merge in the runner codebase.

- run with --fix for gofumpt and golangci
- manual edits for
  - disabling useless package naming warning
  - rename variables that had underscore in their name
  - remove trailing else at the end of a few functions

Reviewed-on: https://code.forgejo.org/forgejo/act/pulls/206
Reviewed-by: Michael Kriese <michael.kriese@gmx.de>
Co-authored-by: Earl Warren <contact@earl-warren.org>
Co-committed-by: Earl Warren <contact@earl-warren.org>

act/schema/schema.go

@@ -89,14 +89,11 @@ type StringDefinition struct {
 	IsExpression bool `json:"is-expression"`
 }
 
-type NumberDefinition struct {
-}
+type NumberDefinition struct{}
 
-type BooleanDefinition struct {
-}
+type BooleanDefinition struct{}
 
-type NullDefinition struct {
-}
+type NullDefinition struct{}
 
 func GetWorkflowSchema() *Schema {
 	sh := &Schema{}