ci: Refactor version variables and update release workflow

- Update variable names in Makefile to improve readability and consistency
- Add new actions to the release workflow for enhanced functionality
- Delete the `.github/workflows/publish.yaml` file to remove unused GitHub action functionality

.github/workflows/release.yaml

@@ -20,4 +20,6 @@ jobs:
           version: ${{ github.ref_name }}
           publish: true
         env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      - run: make publish-package
+      - run: make publish-image

Makefile

@@ -1,6 +1,6 @@
 VENV := . venv/bin/activate &&
-LATEST_TAG := $(shell git describe --tags --abbrev=0)
-LATEST_VERSION := $(shell git describe --tags)
+TAG := $(shell git describe --tags --abbrev=0)
+VERSION ?= $(shell git describe --tags)
 
 -include .env
 export