all: add task linter and fix all warnings

We use revive [1], fieldalignment [2], and shadow [3] as linters.

[1] https://github.com/mgechev/revive
[2] https://pkg.go.dev/golang.org/x/tools@v0.13.0/go/analysis/passes/fieldalignment/cmd/fieldalignment
[3] https://pkg.go.dev/golang.org/x/tools@v0.13.0/go/analysis/passes/shadow/cmd/shadow

1 files changed, 4 insertions, 0 deletions

diff --git a/cli.go b/cli.go
index 446f757..3d1911b 100644
--- a/cli.go
+++ b/cli.go
@@ -19,13 +19,17 @@ import (
 	"golang.org/x/term"
 )
 
+// Readme embed the README.md, rendered in "gotp help".
+//
 //go:embed README.md
 var Readme string
 
+// Cli define the command line interface for gotp program.
 type Cli struct {
 	cfg *config
 }
 
+// NewCli create and initialize new CLI for gotp program.
 func NewCli() (cli *Cli, err error) {
 	var (
 		logp = `NewCli`