feat: add golangci-lint and restore megalinter config (#22)

* feat: add golangci-lint and restore megalinter config

* chore: fix linting, go mod tidy

* fix(ci): add golangci-lint action setup to test.yml

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

* chore: tweaks

* fix(ci): tweaks

* fix(ci): disable go_golangci_lint in megalinter

* chore: yamllint rules

* chore(ci): tweak yml

---------

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

.yamllint.yml

@@ -0,0 +1,20 @@
+---
+extends: relaxed
+
+yaml-files:
+  - '*.yaml'
+  - '*.yml'
+  - '.yamllint'
+
+ignore-from-file: .gitignore
+
+rules:
+  empty-lines:
+    max: 1
+    max-start: 0
+    max-end: 1
+
+  line-length:
+    max: 100
+    allow-non-breakable-words: true
+    allow-non-breakable-inline-mappings: false