https://go.dev/doc/modules/release-workflow#breaking
Fixes https://github.com/woodpecker-ci/woodpecker/issues/2913 fixes
#2654
```
runephilosof@fedora:~/code/platform-woodpecker/woodpecker-repo-configurator (master)$ go get go.woodpecker-ci.org/woodpecker@v2.0.0
go: go.woodpecker-ci.org/woodpecker@v2.0.0: invalid version: module contains a go.mod file, so module path must match major version ("go.woodpecker-ci.org/woodpecker/v2")
```
---------
Co-authored-by: qwerty287 <80460567+qwerty287@users.noreply.github.com>
- move cli files from `cli/drone` to `cli/`
- move cli main to `cmd/cli/main.go` to match agent and server
- use version from `version/version.go` to match agent and server
