migrate tea to urfave v3 (#760)

I tested this somewhat, but I haven't been using the cli before so I'm not sure if there are changes - there shouldn't be though.

Reviewed-on: https://gitea.com/gitea/tea/pulls/760
Reviewed-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: TheFox0x7 <thefox0x7@gmail.com>
Co-committed-by: TheFox0x7 <thefox0x7@gmail.com>

cmd/repos/fork.go

@@ -4,6 +4,7 @@
 package repos
 
 import (
+	stdctx "context"
 	"fmt"
 
 	"code.gitea.io/tea/cmd/flags"
@@ -11,7 +12,7 @@ import (
 	"code.gitea.io/tea/modules/print"
 
 	"code.gitea.io/sdk/gitea"
-	"github.com/urfave/cli/v2"
+	"github.com/urfave/cli/v3"
 )
 
 // CmdRepoFork represents a sub command of repos to fork an existing repo
@@ -31,7 +32,7 @@ var CmdRepoFork = cli.Command{
 	}, flags.LoginRepoFlags...),
 }
 
-func runRepoFork(cmd *cli.Context) error {
+func runRepoFork(_ stdctx.Context, cmd *cli.Command) error {
 	ctx := context.InitCommand(cmd)
 	ctx.Ensure(context.CtxRequirement{RemoteRepo: true})
 	client := ctx.Login.Client()