Logs info/default log messages to eclipse logs only if tracing is

[raghucssit]

enabled.

LSP4E by default logs info/default messages to Eclipse logs. But we want to log info only if tracing is enabled.

see #121

[Copilot]

Pull request overview

This PR adjusts how LSP4E window/logMessage events are forwarded to the Eclipse error log, so that Info/Log messages are only logged when LSP4E tracing is enabled (while still always logging Warning/Error).

Changes:

• Override CopilotLanguageClient.logMessage(...) to suppress Info/Log messages unless tracing is enabled.
• Introduce an LSP4E trace check via Platform.getDebugBoolean("org.eclipse.lsp4e/trace").

[jdneo]

It seems that we need to have a separate PR to bump the version: https://github.com/microsoft/copilot-for-eclipse/blob/main/base.target#L6 first.

I will do it and verify that backward compatibility is fine after the bump.

[raghucssit]

@jdneo I have added junit as well for the feature. It works as expected. Please start a build and see it we can get this merged.

[raghucssit]

@jdneo Please check this PR. This may be a good candidate to get into main soon..
I have fixed everything needed from my side.

[iloveeclipse]

@raghucssit: few things:

1. please rebase & fix conflicts.
2. Note compilation error

Error:  Failed to execute goal org.eclipse.tycho:tycho-compiler-plugin:4.0.13:compile (default-compile) on project com.microsoft.copilot.eclipse.core: Compilation failure: Compilation failure: 
Error:  /home/runner/work/copilot-for-eclipse/copilot-for-eclipse/com.microsoft.copilot.eclipse.core/src/com/microsoft/copilot/eclipse/core/lsp/CopilotLanguageClient.java:[485] 
Error:  	public void logMessage(MessageParams message) {
Error:  	            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Error:  Cannot override the final method from LanguageClientImpl

This error is coming because Copilot still uses too old LSP4E version. The "final" modifier was removed in LSP4E 0.28.0 release only, see:

• https://github.com/eclipse-lsp4e/lsp4e/releases/tag/0.28.0
• eclipse-lsp4e/lsp4e@4ec874a

3. Also note that LanguageClientImpl is marked as deprecated for removal since 0.27.4

• https://github.com/eclipse-lsp4e/lsp4e/releases/tag/0.27.4
• eclipse-lsp4e/lsp4e@0b2dcc3

@jdneo: would it be possible to bump Copilot lsp4e dependency from current 0.18.1 to 0.18.30 at least? This would also imply bump for lsp4j from 0.21.1 to 0.24.0 (at least).