Fix output grid and sql console

[dnlw07]

Summary

Console messages panel

• New message history is capped at 200 items (MessagesProvider.MAX_ITEMS), prepended newest-first (explorer/index.ts).
• Added Copy All Messages and Clear Messages commands/context-menu entries, wired through getAllConsoleMessages/clearConsoleMessages.
• Fixed duplicated/spammed messages: removed the webview→extension REQUEST_SYNC_CONSOLE_MESSAGES round-trip and the "Not focused to results view" message entirely (results.ts, ResultsContext.tsx).

Results grid (Table)

• Right-click context menu overhaul: preserves existing multi-row selection instead of collapsing it to the clicked row; added Copy Column Name, Copy Column Names, Copy Selected as CSV, Copy Selected as JSON; reordered/regrouped menu sections with cleaner divider logic.
• Added keyboard shortcuts: Esc clears selection, Ctrl/Cmd+A selects all rows (ignored while focus is in an input/textarea).
• Added Excel-style row selection: plain click selects one row and sets an anchor, Shift+click selects a range from the anchor, Ctrl/Cmd+click toggles individual rows.

Connection management

• New sqltools.connectionSwitch setting: auto-switches the active connection based on glob patterns matched against the focused file's name/path (globMatch in extension.ts).
• Status bar now updates immediately on connect via a direct statusBar.setText() call, fixing it not updating when the SQLTools tree view isn't visible.

package.json

• New commands/menu entries for copyAllConsoleMessages, clearConsoleMessages, and the new sqltools.connectionSwitch configuration schema.