Add SQL Notebooks support (.exabook files)

Interactive notebooks with SQL code cells and markdown documentation.
SQL cells execute against the active Exasol connection with inline
HTML result tables showing row counts, timing, and execution order.

- NotebookSerializer: JSON-based .exabook format with transient outputs
- NotebookController: executes cells via QueryExecutor with cancellation
- CodeLens hidden in notebook cells (they have native run buttons)
- Demo notebook in examples/
- Bump version to 1.4.0

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: mikhail-zhadanov

.vscodeignore

@@ -19,5 +19,6 @@ esbuild.mjs
 CLAUDE.md
 .claude/**
 specs/**
+examples/**
 .serena/**
 vendor/**

CHANGELOG.md

@@ -2,10 +2,15 @@
 
 All notable changes to the "Exasol" extension will be documented in this file.
 
-## [1.3.2] - 2026-03-24
+## [1.4.0] - 2026-03-24
+
+### Added
+- **SQL Notebooks** — interactive `.exabook` notebooks with SQL code cells, inline HTML result tables, markdown documentation cells, execution order tracking, and cancellation support
+- CodeLens "Execute" links are now hidden in notebook cells (notebooks have their own run buttons)
 
 ### Changed
 - Release workflow now automatically publishes to the VS Marketplace
+- Removed deprecated `vscode-test` dependency (replaced by `@vscode/test-electron`)
 
 ## [1.3.0] - 2026-03-18
 

README.md

@@ -20,6 +20,7 @@ A Visual Studio Code extension for working with Exasol databases. Provides datab
 - **Object actions** — right-click to preview data, show DDL, generate SELECT, describe table
 - **Results viewer** — sortable, filterable grid with CSV export and cell inspection
 - **Query history** — automatic tracking with execution time, row counts, and error indicators
+- **SQL Notebooks** — interactive `.exabook` notebooks with SQL cells, inline results, and markdown documentation
 - **SQL formatting** — configurable keyword case, indentation, and statement spacing
 - **Session management** — active schema tracking, persistent state across restarts
 
@@ -29,6 +30,7 @@ A Visual Studio Code extension for working with Exasol databases. Provides datab
 |--------|---------------|-----|
 | Execute query | `Ctrl+Enter` | `Cmd+Enter` |
 | Execute selection | `Ctrl+Shift+Enter` | `Cmd+Shift+Enter` |
+| Execute entire script | `Ctrl+Alt+Enter` | `Cmd+Alt+Enter` |
 | Find database object | `Ctrl+Shift+F` (objects view) | `Cmd+Shift+F` (objects view) |
 
 ## Configuration

examples/demo.exabook

@@ -0,0 +1,32 @@
+[
+  {
+    "kind": 1,
+    "language": "markdown",
+    "value": "# Exasol SQL Notebook Demo\n\nThis notebook demonstrates interactive SQL execution against Exasol.\nMake sure you have an active connection before running cells."
+  },
+  {
+    "kind": 2,
+    "language": "exasol-sql",
+    "value": "SELECT CURRENT_TIMESTAMP, CURRENT_USER, CURRENT_SCHEMA"
+  },
+  {
+    "kind": 1,
+    "language": "markdown",
+    "value": "## Browse schemas"
+  },
+  {
+    "kind": 2,
+    "language": "exasol-sql",
+    "value": "SELECT SCHEMA_NAME, SCHEMA_OWNER\nFROM SYS.EXA_SCHEMAS\nORDER BY SCHEMA_NAME"
+  },
+  {
+    "kind": 1,
+    "language": "markdown",
+    "value": "## Check active sessions"
+  },
+  {
+    "kind": 2,
+    "language": "exasol-sql",
+    "value": "SELECT SESSION_ID, USER_NAME, STATUS, CLIENT\nFROM EXA_ALL_SESSIONS\nORDER BY SESSION_ID"
+  }
+]