Fix issues in the MI Extension

[ChinthakaJ98]

This PR will fix the below mentioned issues.

• JDK 25 build issue with class mediators
• Issues in docker-build configuration changes
• No option to edit the pom.xml of the docker-build module in a consolidated project

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Actionable comments posted: 3

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@packages/mi-extension/src/project-explorer/project-explorer-provider.ts`:
- Around line 219-223: In the hasPom branch of the project explorer provider,
replace buildReadOnlyFileEntry for pomPath with the standard editable file-entry
builder so pom.xml is editable and does not receive the readOnlyFile context.
Keep buildReadOnlyFolderChildren unchanged so the docker-build folder remains
read-only.

In `@packages/mi-extension/src/util/onboardingUtils.ts`:
- Around line 806-813: Update the updatePomXml call guarded by
hasSynapseCoreDependency to match both groupId org.apache.synapse and artifactId
synapse-core before selecting version. Preserve the existing synapseCoreVersion
update while preventing dependencies with the same artifactId from other groups
from being modified.

In `@packages/mi-extension/src/util/templates.ts`:
- Around line 496-507: Update libLineRegex in the existing-content parsing flow
to accept one or more whitespace characters between COPY, the library path, and
${WSO2_SERVER_HOME}, while preserving the matched original line in
existingLibLines. Add regression coverage for multiple spaces and tab-separated
valid COPY directives to ensure libsCopyLines reuses them instead of emitting
commented defaults.

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Fix all unresolved CodeRabbit comments on this PR:

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Configuration used: Organization UI

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📥 Commits

Reviewing files that changed from the base of the PR and between 77e19b1 and 4b7f96b.

📒 Files selected for processing (5)

• packages/mi-extension/src/debugger/pomResolver.ts
• packages/mi-extension/src/project-explorer/project-explorer-provider.ts
• packages/mi-extension/src/stateMachine.ts
• packages/mi-extension/src/util/onboardingUtils.ts
• packages/mi-extension/src/util/templates.ts