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)

editors/vscode/README.md

@@ -0,0 +1,75 @@
+# PgTidy — VSCode Extension
+
+Formats and lints PostgreSQL/PL-pgSQL files using the `pgtidy` language server.
+
+## Requirements
+
+- `pgtidy` binary on `PATH` (see [Build the binary](#build-the-binary) below)
+- Go 1.21+ (to build from source)
+- VSCode 1.85+
+
+## Build the binary
+
+**Option A — install directly with Go (recommended):**
+
+```sh
+go install git.warky.dev/wdevs/pgtidy/cmd/pgtidy@latest
+```
+
+The binary lands in `$(go env GOPATH)/bin/`. Make sure that directory is on your `PATH`.
+
+**Option B — build from source and place manually:**
+
+```sh
+git clone https://git.warky.dev/wdevs/PgTidy
+cd PgTidy
+go build -o pgtidy ./cmd/pgtidy
+
+# Linux / macOS — move to a directory on PATH
+mv pgtidy /usr/local/bin/
+
+# Windows — move to a directory on PATH, e.g.
+# move pgtidy.exe C:\tools\
+```
+
+Verify the binary is reachable:
+
+```sh
+pgtidy version
+```
+
+If you place it somewhere not on `PATH`, set the full path in VSCode settings:
+
+```json
+"pgtidy.path": "/path/to/pgtidy"
+```
+
+## Install from `.vsix`
+
+1. Build the package: `pnpm run build && pnpm run package`
+2. In VSCode: **Extensions** → `···` menu → **Install from VSIX…** → select `pgtidy-*.vsix`
+
+Or via CLI:
+
+```sh
+code --install-extension pgtidy-0.1.0.vsix
+```
+
+## Settings
+
+| Setting | Default | Description |
+|---|---|---|
+| `pgtidy.path` | `"pgtidy"` | Path to the binary if not on `PATH` |
+| `pgtidy.enable` | `true` | Enable/disable the language server |
+
+## Features
+
+- **Format on save** — configure via VSCode's `editor.formatOnSave`
+- **Diagnostics** — lint findings shown inline as you type (MIG001–MIG003, COR001–003, NAM001–003)
+- **Quick fixes** — lightbulb actions for MIG001 (add `CONCURRENTLY`) and MIG003 (add `NOT VALID`)
+
+`.sql` and `.pgsql` files are both handled.
+
+## Troubleshooting
+
+**No formatting / diagnostics:** Open the Output panel → select **PgTidy** to see server errors. Most common cause: `pgtidy` not found — set `pgtidy.path` to the full binary path.