ci: Add GitLab CI with semantic-release to @carealytix package registry

- .gitlab-ci.yml: single release stage, builds and runs semantic-release on main
- .releaserc: commit-analyzer, release-notes, npm publish, gitlab release, git tag
- package.json: rename to @carealytix/codewalkers, add repository, release script, semantic-release devDeps
- README.md: add GitLab Package Registry install instructions with .npmrc config

.releaserc

@@ -0,0 +1,20 @@
+{
+  "branches": [
+    "main"
+  ],
+  "plugins": [
+    "@semantic-release/commit-analyzer",
+    "@semantic-release/release-notes-generator",
+    "@semantic-release/npm",
+    "@semantic-release/gitlab",
+    [
+      "@semantic-release/git",
+      {
+        "assets": [
+          "package.json"
+        ],
+        "message": "chore(release): ${nextRelease.version} [skip ci]\n\n${nextRelease.notes}"
+      }
+    ]
+  ]
+}