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)

cmd/pgtidy/main.go

@@ -24,6 +24,10 @@ func run(args []string, stdin io.Reader, stdout, stderr io.Writer) int {
 		return cmdFmt(args[1:], stdin, stdout, stderr)
 	case "lint":
 		return cmdLint(args[1:], stdin, stdout, stderr)
+	case "lsp":
+		return cmdLsp(args[1:], stdin, stdout, stderr)
+	case "config":
+		return cmdConfig(args[1:], stdin, stdout, stderr)
 	case "version", "--version", "-v":
 		fmt.Fprintf(stdout, "pgtidy %s\n", version)
 		return 0
@@ -41,10 +45,12 @@ func usage(w io.Writer) {
 	fmt.Fprint(w, `pgtidy — PostgreSQL formatter and linter
 
 Usage:
-  pgtidy fmt  [flags] [files...]   Format SQL/PL-pgSQL (stdin if no files)
-  pgtidy lint [flags] [files...]   Lint SQL (stdin if no files)
-  pgtidy version                   Print version
-  pgtidy help                      Show this help
+  pgtidy fmt    [flags] [files...]  Format SQL/PL-pgSQL (stdin if no files)
+  pgtidy lint   [flags] [files...]  Lint SQL (stdin if no files)
+  pgtidy config                     Print effective configuration
+  pgtidy lsp                        Start LSP server (stdio, for editors)
+  pgtidy version                    Print version
+  pgtidy help                       Show this help
 
 fmt flags:
   -w, --write    Rewrite files in place