This is the first step towards support for multiple forges (#138). It
inserts a forge using the currently existing env varaibles into db and
uses this forge from db later on in all places of the code.
closes#621
addresses #138
# TODO
- [x] add forges table
- [x] add id of forge to repo
- [x] use forge of repo
- [x] add forge from env vars to db if not exists
- [x] migrate repo.ForgeID to the newly generated forge
- [x] support cache with forge from repo
- [x] maybe add forge loading cache? (use LRU cache for forges, I expect
users to have less than 10 forges normally)
---------
Co-authored-by: qwerty287 <80460567+qwerty287@users.noreply.github.com>
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>
