perf: use incremental build by default

[wenytang-ms]

This updates Project Manager for Java so regular build actions use JDT LS incremental build by default, while keeping explicit full rebuild actions available.

Changes

• Build All calls java.workspace.compile(false).
• Build Project calls java.project.build(..., false).
• Rebuild All calls java.workspace.compile(true) for CLEAN_BUILD + FULL_BUILD.
• Rebuild Project calls java.project.build(..., true).
• The default java (build) task now uses isFullBuild: false, and resolved tasks without isFullBuild also default to incremental.
• The isFullBuild task schema default is now the boolean false.

Notes

The boolean build flag is passed through vscode-java to JDT LS:

• false -> IncrementalProjectBuilder.INCREMENTAL_BUILD
• true -> CLEAN_BUILD + FULL_BUILD

This change affects Project Manager build commands/tasks. It does not change Maven/Gradle external builds or the compiler backend selection (ECJ by default, experimental javac when enabled).

Fixes #878.
Related: microsoft/vscode-java-pack#1536.

[Copilot]

Pull request overview

This PR changes Project Manager for Java’s internal build commands/tasks to use JDT LS incremental build by default, while keeping explicit “rebuild” (clean + full) actions available for users who need them.

Changes:

• Switches “Build All / Build Project” to call JDT LS incremental build (full flag = false) and adds/keeps “Rebuild …” variants (full flag = true).
• Updates the default java (build) task and task schema so isFullBuild defaults to boolean false, including when the property is omitted.
• Updates command titles and localized strings, plus a unit test assertion for the default task.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
test/suite/buildTask.test.ts	Asserts default build task is incremental (isFullBuild: false).
src/views/dependencyDataProvider.ts	Adds new build/rebuild workspace + build project commands and routes to incremental vs full builds.
src/tasks/build/buildTaskProvider.ts	Changes default task to incremental and defaults resolved tasks to incremental when isFullBuild is absent.
src/commands.ts	Introduces new command IDs for rebuild workspace and build project.
package.nls.zh-tw.json	Updates zh-tw command labels and clarifies isFullBuild description.
package.nls.zh-cn.json	Updates zh-cn command labels and clarifies isFullBuild description.
package.nls.json	Updates English command labels and adds new command labels.
package.json	Adds new commands/menus and changes task schema default for isFullBuild to false (boolean).

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