Build: make bra a local dependency (#17414)

Same idea as with the `gosec`, `revive` and etc.
Allows you to execute `make bra` as pinned local dependency instead
as global one. And therefore alleviates dependency installation issues.

README also updated - I was thinking to provide verbose installation instructions
for it. Since with that way we assume make is installed on the
developer system.

But it might be premature right now?

Makefile

@@ -57,10 +57,6 @@ test-js:
 
 test: test-go test-js
 
-run:
-	@echo "start a server"
-	./bin/grafana-server
-
 clean:
 	@echo "cleaning"
 	rm -rf node_modules
@@ -78,6 +74,10 @@ scripts/go/bin/gosec: scripts/go/go.mod
 	@cd scripts/go; \
 	$(GO) build -o ./bin/gosec github.com/securego/gosec/cmd/gosec
 
+scripts/go/bin/bra: scripts/go/go.mod
+	@cd scripts/go; \
+	$(GO) build -o ./bin/bra github.com/Unknwon/bra
+
 revive: scripts/go/bin/revive
 	@scripts/go/bin/revive \
 		-formatter stylish \
@@ -89,6 +89,16 @@ revive-alerting: scripts/go/bin/revive
 		-formatter stylish \
 		./pkg/services/alerting/...
 
+run: scripts/go/bin/bra
+	@scripts/go/bin/bra run
+
+# TODO recheck the rules and leave only necessary exclusions
+gosec: scripts/go/bin/gosec
+	@scripts/go/bin/gosec -quiet \
+		-exclude=G104,G107,G201,G202,G204,G301,G304,G401,G402,G501 \
+		-conf=./scripts/go/configs/gosec.json \
+		$(GO_FILES)
+
 # create docker-compose file with provided sources and start them
 # example: make devenv sources=postgres,openldap
 ifeq ($(sources),)
@@ -111,10 +121,3 @@ devenv-down:
 	@cd devenv; \
 	test -f docker-compose.yaml && \
 	docker-compose down || exit 0;
-
-# TODO recheck the rules and leave only necessary exclusions
-gosec: scripts/go/bin/gosec
-	@scripts/go/bin/gosec -quiet \
-		-exclude=G104,G107,G201,G202,G204,G301,G304,G401,G402,G501 \
-		-conf=./scripts/go/configs/gosec.json \
-		$(GO_FILES)