Reduce zoom increment for Ctrl+mouse wheel in blocks workspace

[Copilot]

Issue

When using Ctrl+mouse wheel to zoom in the blocks workspace, the zoom increment was too large (approximately 20% per scroll), making it difficult to control and resulting in large, disruptive jumps in zoom level.

Changes

Added a zoom configuration to the blocklyOptions in pxtarget.json with a scaleSpeed of 1.05. This reduces the zoom increment when using Ctrl+mouse wheel in the blocks workspace from approximately 20% to 5% per scroll event.

Before/After

Before: Each mouse wheel tick would change the zoom by approximately 20% (default scaleSpeed of 1.2), making it difficult to control and leading to large jumps in zoom level.

After: Each mouse wheel tick now changes the zoom by only 5%, providing much finer control and a smoother zooming experience that's closer to what a single +/- button click would do.

Implementation

"blocklyOptions": {
    "grid": {
        "spacing": 30,
        "length": 1,
        "colour": "rgb(189, 195, 199)",
        "snap": false
    },
    "zoom": {
        "scaleSpeed": 1.05
    }
}

This is a minimal change that only affects the zoom behavior when using Ctrl+mouse wheel and doesn't impact any other functionality. The modification is consistent with Blockly configuration best practices.

Fixes #6809.

Warning

Firewall rules blocked me from connecting to one or more addresses

I tried to connect to the following addresses, but was blocked by firewall rules:

• github.com (HTTP Only)
  • Triggering command: ssh -oStrictHostKeyChecking=accept-new -o SendEnv=GIT_PROTOCOL git@github.com git-upload-pack '/microsoft/pxt-arcade-sim.git' (packet block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to my firewall allow list

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