Build plugin with grafana toolkit (#1539)

* Use grafana toolkit template for building plugin

* Fix linter and type errors

* Update styles building

* Fix sass deprecation warning

* Remove empty js files produced by webpack building sass

* Fix signing script

* Replace classnames with cx

* Fix data source config page

* Use custom webpack config instead of overriding original one

* Use gpx_ prefix for plugin executable

* Remove unused configs

* Roll back react hooks dependencies usage

* Move plugin-specific ts config to root config file

* Temporary do not use rst2html for function description tooltip

* Remove unused code

* remove unused dependencies

* update react table dependency

* Migrate tests to typescript

* remove unused dependencies

* Remove old webpack configs

* Add sign target to makefile

* Add magefile

* Update CI test job

* Update go packages

* Update build instructions

* Downgrade go version to 1.18

* Fix go version in ci

* Fix metric picker

* Add comment to webpack config

* remove angular mocks

* update bra config

* Rename datasource-zabbix to datasource (fix mage build)

* Add instructions for building backend with mage

* Fix webpack targets

* Fix ci backend tests

* Add initial e2e tests

* Fix e2e ci tests

* Update docker compose for cypress tests

* build grafana docker image

* Fix docker stop task

* CI: add Grafana compatibility check

DEVELOPMENT_GUIDE.md

@@ -1,6 +1,23 @@
 # Plugin development
 
-### Debugging backend plugin
+## Building plugin
+
+```sh
+# install frontend deps
+yarn install --pure-lockfile
+# build frontend
+yarn build
+#build backend for current platform
+mage -v build:backend
+```
+
+## Rebuild backend on changes
+
+```sh
+mage watch
+```
+
+## Debugging backend plugin
 
 For debugging backend part written on Go, you should go through a few steps. First, build a plugin with special flags for debugging: