revert: tea 1.0 rewrite (#1122–#1126) (#1146)

Reverts #1126, #1125, #1124, #1123 and #1122.

`go.mod` keeps the Go 1.26 line with toolchain `go1.26.9` (instead of the original `go1.26.6`) so the security fix from #1131 isn't lost.

reopens #69
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Reviewed-on: https://gitea.com/gitea/tea/pulls/1146
Reviewed-by: TheFox0x7 <95654+thefox0x7@noreply.gitea.com>

docs/docs.go

@@ -0,0 +1,29 @@
+// Copyright 2023 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+//go:generates
+package main
+
+import (
+	"context"
+	"os"
+
+	docs "github.com/urfave/cli-docs/v3"
+	"github.com/urfave/cli/v3"
+
+	"gitea.dev/tea/cmd"
+)
+
+// CmdDocs generates markdown for tea
+func main() {
+	cli := &cli.Command{
+		Name:        "docs",
+		Hidden:      true,
+		Description: "Generate CLI docs",
+		Flags:       cmd.DocRenderFlags,
+		Action: func(ctx context.Context, params *cli.Command) error {
+			return cmd.RenderDocs(params, cmd.App(), docs.ToMarkdown)
+		},
+	}
+	cli.Run(context.Background(), os.Args)
+}