Implement deployment and publishing features with SSH and S3 support

- Add config tests for loading and validation of configuration files.
- Introduce deployer interface and SSH deployer implementation.
- Implement git utility functions for retrieving tags and commit hashes.
- Create hook execution functionality for running shell commands.
- Develop notification system for deployment status updates.
- Implement artifact publishing to S3 and remote servers via SSH.
- Add shell utility for safe command execution.
- Create template processing for dynamic message generation.
- Include tests for all new functionalities to ensure reliability.

Author: sxwebdev

Makefile

@@ -4,6 +4,15 @@ build:
 install:
 	go install ./cmd/gcx
 
+test:
+	go test -v ./...
+
+fmt:
+	gofumpt -l -w .
+
+lint:
+	golangci-lint run
+
 docker-build:
 	docker build \
 		--build-arg VERSION=`git describe --tags --abbrev=0 || echo "0.0.0"` \