chore: remove boilerplate Taskfile

All tasks (test, build, lint, fmt, vet, cov) are handled natively
by `core go` commands. Taskfile was redundant wrapper.

Co-Authored-By: Virgil <virgil@lethean.io>

Taskfile.yml

@@ -1,46 +0,0 @@
-version: '3'
-
-tasks:
-  test:
-    desc: Run all tests
-    cmds:
-      - go test ./...
-
-  lint:
-    desc: Run golangci-lint
-    cmds:
-      - golangci-lint run ./...
-
-  fmt:
-    desc: Format all Go files
-    cmds:
-      - gofmt -w .
-
-  vet:
-    desc: Run go vet
-    cmds:
-      - go vet ./...
-
-  build:
-    desc: Build all Go packages
-    cmds:
-      - go build ./...
-
-  cov:
-    desc: Run tests with coverage and open HTML report
-    cmds:
-      - go test -coverprofile=coverage.out ./...
-      - go tool cover -html=coverage.out
-
-  tidy:
-    desc: Tidy go.mod
-    cmds:
-      - go mod tidy
-
-  check:
-    desc: Run fmt, vet, lint, and test in sequence
-    cmds:
-      - task: fmt
-      - task: vet
-      - task: lint
-      - task: test