* Clean the "tools" directory. The "tools" directory contains only two
files, move them.
* The "external_renderer.go" works like "cat" command to echo Stdin to
Stdout , to help testing.
* The `// gobuild: external_renderer` is incorrect, there should be no
space: `//gobuild: external_renderer`
* The `fmt.Print(os.Args[1])` is not a well-defined behavior, and it's
never used.
* The "watch.sh" is for "make watch", it's somewhat related to "build"
* After this PR, there is no "tools" directory, the project root
directory looks slightly simpler than before.
* Remove the legacy "contrib/autoboot.sh", there is no
"gogs_supervisord.sh"
* Remove the legacy "contrib/mysql.sql", it's never mentioned anywhere.
* Remove the legacy "contrib/pr/checkout.go", it has been broken for
long time, and it introduces unnecessary dependencies of the main code
base.
It use old en-US locales as reference, fill the old other locales with
new locales.
----
## More broken translations
Many translations are still broken. The reason is: at the last time
restoring the ini to crowdin, many semicolon are treated as comments.
Two kinds of broken strings:
### Some translations can be re-translated
<details>
```
skipping options/locale/locale_si-LK.ini org teams.add_nonexistent_repo
skipping options/locale/locale_tr-TR.ini repo commits.search.tooltip
skipping options/locale/locale_es-ES.ini repo settings.trust_model.committer.desc
skipping options/locale/locale_es-ES.ini admin dashboard.new_version_hint
skipping options/locale/locale_pt-PT.ini org teams.add_nonexistent_repo
skipping options/locale/locale_hu-HU.ini install require_sign_in_view_popup
skipping options/locale/locale_hu-HU.ini repo migrate.invalid_local_path
skipping options/locale/locale_id-ID.ini repo migrate.invalid_local_path
skipping options/locale/locale_id-ID.ini org teams.add_nonexistent_repo
skipping options/locale/locale_de-DE.ini repo settings.protect_protected_file_patterns_desc
```
</details>
So this PR also does some small changes on them, to trigger the
re-translation.
### The `locale_el-GR.ini` contains many broken tranlsations
I guess we should reset them from crowdin side, then translators can
re-translate them.
----
Update: in latest main, the strings have been fixed.
## TODO
Update: the el-GR translators have done great job and fixes these broken
translations.
<details>
Merge this PR ASAP and upload `locale_el-GR.ini` to crowdin to remove
broken strings.
Out-dated, fixed in main.
</details>
---------
Co-authored-by: delvh <dev.lh@web.de>
