Prepare for 0.20.0

[jdneo]

No description provided.

[Copilot]

Pull request overview

Prepares the GitHub Copilot for Eclipse codebase for the upcoming 0.20.0 development cycle by bumping version identifiers across Maven/Tycho + OSGi metadata and refreshing end-user release documentation.

Changes:

• Bump plugin/version coordinates to 0.20.0-SNAPSHOT / 0.20.0.qualifier across the build and bundles.
• Update bundle dependency version pins (Require-Bundle) to reference 0.20.0.
• Add 0.20.0 release notes and changelog entry.

Reviewed changes

Copilot reviewed 20 out of 23 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
pom.xml	Updates the root Maven/Tycho version property to 0.20.0-SNAPSHOT.
com.microsoft.copilot.eclipse.ui/META-INF/MANIFEST.MF	Bumps UI bundle version and aligns required bundle version pins to 0.20.0.
com.microsoft.copilot.eclipse.ui/intro/whatsnew/WHATISNEW.md	Adds 0.20.0 “What’s New” section with highlights and screenshot reference.
com.microsoft.copilot.eclipse.ui.test/META-INF/MANIFEST.MF	Bumps UI test bundle version and updates required bundle version pins to 0.20.0.
com.microsoft.copilot.eclipse.ui.terminal/META-INF/MANIFEST.MF	Bumps modern terminal integration bundle version and required terminal API pin to 0.20.0.
com.microsoft.copilot.eclipse.ui.terminal.tm/META-INF/MANIFEST.MF	Bumps TM terminal integration bundle version and required terminal API pin to 0.20.0.
com.microsoft.copilot.eclipse.ui.jobs/META-INF/MANIFEST.MF	Bumps Jobs bundle version and updates core/ui required bundle pins to 0.20.0.
com.microsoft.copilot.eclipse.terminal.api/META-INF/MANIFEST.MF	Bumps terminal API bundle version and updates required core bundle pin to 0.20.0.
com.microsoft.copilot.eclipse.swtbot.test/META-INF/MANIFEST.MF	Bumps SWTBot test bundle version to 0.20.0.qualifier.
com.microsoft.copilot.eclipse.repository/category.xml	Updates the published feature version in the update site category to 0.20.0.qualifier.
com.microsoft.copilot.eclipse.feature/feature.xml	Bumps the Eclipse feature version to 0.20.0.qualifier.
com.microsoft.copilot.eclipse.core/META-INF/MANIFEST.MF	Bumps core bundle version to 0.20.0.qualifier.
com.microsoft.copilot.eclipse.core.test/META-INF/MANIFEST.MF	Bumps core test fragment version and updates required core bundle pin to 0.20.0.
com.microsoft.copilot.eclipse.core.agent.win32/META-INF/MANIFEST.MF	Bumps Windows agent fragment version to 0.20.0.qualifier.
com.microsoft.copilot.eclipse.core.agent.macosx.x64/META-INF/MANIFEST.MF	Bumps macOS x64 agent fragment version to 0.20.0.qualifier.
com.microsoft.copilot.eclipse.core.agent.macosx.aarch64/META-INF/MANIFEST.MF	Bumps macOS aarch64 agent fragment version to 0.20.0.qualifier.
com.microsoft.copilot.eclipse.core.agent.linux.x64/META-INF/MANIFEST.MF	Bumps Linux x64 agent fragment version to 0.20.0.qualifier.
com.microsoft.copilot.eclipse.core.agent.linux.aarch64/META-INF/MANIFEST.MF	Bumps Linux aarch64 agent fragment version to 0.20.0.qualifier.
com.microsoft.copilot.eclipse.branding/META-INF/MANIFEST.MF	Bumps branding bundle version to 0.20.0.qualifier.
CHANGELOG.md	Adds 0.20.0 changelog section with Added/Changed/Fixed items and links.