Enhance query performance analysis and dashboard styles

[ric-v]

This pull request delivers a significant update for the PgStudio (PostgreSQL Explorer) extension, marking the transition to a stable v1.0.0 release with a new "nightly" channel and introducing major new features, UX improvements, and expanded documentation. The most notable changes include a toggleable SQL Preview (DDL Viewer), enhanced dashboard telemetry, broader PostgreSQL object support, and improved result rendering and notebook workflows. The changelog and documentation have been updated to reflect these enhancements, and the extension now uses a "1.0.0-nightly" version for pre-release/nightly builds.

Key changes:

DDL Viewer (SQL Preview) Features

• Added a user-facing toggle for the SQL Preview (DDL Viewer) via a new command (postgres-explorer.ddlViewer.toggleEnabled) and setting (pgstudio.ddlViewer.enabled), allowing users to quickly enable or disable DDL preview actions. This includes new toolbar icons and CodeLens actions for enabling/disabling the preview, copying SQL, and opening editable copies. [1] [2] [3] [4] [5] [6] [7] [8] [9]

Dashboard and Result UX Enhancements

• Upgraded the dashboard with richer visual telemetry, including status badges, lock/wait indicators, and improved performance cards. The result renderer now supports column stats, tab strip, transpose view, filter bar upgrades, and enhanced cell editor support. [1] [2]

PostgreSQL Object and Workflow Expansion

• Added command suites and workflows for additional PostgreSQL object types (aggregates, domains, event triggers, partitions, publications, rules, sequences, tablespaces, triggers), and extended SQL templates to support these. New schema search, index advisor, migration generator, and ERD/import tooling panels are introduced. [1] [2]

Notebook and Editor Improvements

• Enhanced notebook management with a new picker workflow and improved metadata context. Added a SQL formatter command/service and improved notebook UX. [1] [2]

Packaging, Versioning, and Documentation

• Switched the extension version to "1.0.0-nightly" for nightly/pre-release builds and aligned marketplace badges and documentation links accordingly. Expanded the CHANGELOG.md and README.md to document new features, object coverage, limitations, and nightly channel details. [1] [2] [3] [4] [5] [6]

These changes bring PgStudio to production-ready stability while enabling rapid iteration and user feedback through the nightly channel.