Add CopyToClipboard block to Sharing component (Android & iOS)

[Akashgite1]

General items:

• I have updated the relevant documentation files under docs/
• My code follows the:
  • Google Java style guide
  • Google JavaScript style guide
• ant tests passes on my machine

If your code changes how something works on the device (i.e., it affects the companion):

• I branched from ucr
• My pull request has ucr as the base

Further, if you've changed the blocks language or another user-facing designer/blocks API (added a SimpleProperty, etc.):

• I have updated the corresponding version number in YaVersion.java
• I have updated the corresponding upgrader in YoungAndroidFormUpgrader.java
• I have updated the corresponding entries in versioning.js

For all other changes:

• I branched from master
• My pull request has master as the base

What does this PR accomplish?

This PR adds a new CopyToClipboard method to the Sharing component, allowing developers to copy text to the system clipboard without invoking the platform share sheet.

The implementation works consistently across platforms:

• Android uses ClipboardManager and ClipData
• iOS uses UIPasteboard.general

The change is additive and backward compatible.

Summary

This PR adds a new CopyToClipboard method to the Sharing component, allowing apps to copy text to the system clipboard without invoking the platform share sheet.

Platform support

• Android: Uses ClipboardManager and ClipData
• iOS: Uses UIPasteboard.general

Versioning

• Bumped SHARING_COMPONENT_VERSION from 1 → 2
• Updated blocklyeditor/src/versioning.js (no upgrade required)

Notes

This is an additive, backward-compatible change. No existing blocks or behaviors are modified, and no SCM upgrades are required.
No YoungAndroidFormUpgrader changes are required since this PR only adds a new method and does not alter existing properties or block semantics.

Resolves #3736

[AppInventorWorkerBee]

Can one of the admins verify this patch?

[AppInventorWorkerBee]

Can one of the admins verify this patch?

[ewpatton]

@Akashgite1 Make sure to update YoungAndroidFormUpgrader.java, otherwise existing projects with a Sharing component will report an error.

[Akashgite1]

Added Sharing component handling in YoungAndroidFormUpgrader for version 2 (CopyToClipboard).
This is an additive change; no property migrations are required.

[ewpatton]

Make sure to actually build and test this code as well.

[Akashgite1]

@ewpatton

✅ Block Visible in UI

✅ Tested Locally
1️⃣ Custom Companion Build

Verified:

• Clipboard content copies correctly
• Able to paste into other apps successfully

2️⃣ Compiled APK

Tested scenarios:

• Empty string
• Long string
• Unicode strings (emoji & multilingual)
• Multiple rapid invocations

No crashes or permission issues observed.

[SusanRatiLane]

@AppInventorWorkerBee ok to test