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/lsp.go

@@ -0,0 +1,28 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"os"
+
+	"git.warky.dev/wdevs/pgtidy/pkg/lsp"
+)
+
+func cmdLsp(args []string, stdin io.Reader, stdout, stderr io.Writer) int {
+	for _, a := range args {
+		if a == "-h" || a == "--help" {
+			fmt.Fprintln(stdout, "pgtidy lsp — start the Language Server Protocol server (stdio transport)")
+			return 0
+		}
+	}
+	wd, err := os.Getwd()
+	if err != nil {
+		wd = "."
+	}
+	if err := lsp.Serve(context.Background(), stdin, stdout, wd); err != nil {
+		fmt.Fprintf(stderr, "pgtidy lsp: %v\n", err)
+		return 1
+	}
+	return 0
+}