feat: add LSP server, VSCode + DataGrip extensions, release infra, autofix

- pkg/lsp: JSON-RPC 2.0 LSP server (formatting, diagnostics, codeAction quick-fixes)
- cmd/pgtidy: lsp and config subcommands
- pkg/diagnostics: TextFix struct for byte-range autofixes
- pkg/lint: MIG001/MIG003 autofixes, ApplyFixes helper, --fix flag on lint command
- editors/vscode: TypeScript extension with LanguageClient, showVersion/showConfig/formatDocument commands, logo
- editors/datagrip: Gradle JetBrains plugin via LSP4IJ, pluginIcon
- .goreleaser.yaml, .github/workflows: CI + release pipeline
- Makefile: snapshot, release, vscode-compile, vscode-package targets
- go.mod + all imports: module path updated to git.warky.dev/wdevs/pgtidy
- assets: logo files (256px, 128px, 1024px, ico)

Makefile

@@ -2,7 +2,7 @@ APP     := pgtidy
 CMD     := ./cmd/pgtidy
 DIST    := dist
 
-.PHONY: build test lint vet fmt clean
+.PHONY: build test lint vet fmt clean release snapshot vscode-compile vscode-package
 
 ## build: compile binary for the current platform
 build:
@@ -27,3 +27,20 @@ lint: vet
 ## clean: remove build artifacts
 clean:
 	rm -rf $(DIST)
+
+## snapshot: build multi-platform binaries without publishing (requires goreleaser)
+snapshot:
+	goreleaser release --snapshot --clean
+
+## release: tag and publish a GitHub release (requires GITHUB_TOKEN + goreleaser)
+release:
+	goreleaser release --clean
+
+## vscode-compile: compile the VSCode extension TypeScript
+vscode-compile:
+	cp -r assets editors/vscode/assets
+	cd editors/vscode && pnpm install && pnpm run build
+
+## vscode-package: build the .vsix package
+vscode-package: vscode-compile
+	cd editors/vscode && pnpm run package