Reorganize README: remove verbose sections and move manual tasks

Fix VS Code config generation in generateKotlinLspWorkspace task

update README.md

Make generateKotlinLspWorkspace task also generate VS Code config when enabled

Remove outdated migration note from README.md

Merge and deduplicate Purpose and Problem Solved into What You Get

Add hyperlinks and clean up Known Limitations in README.md

Simplify table of contents in README.md

Add navigatable table of contents to README.md

Fix hardcoded VS Code launch intent and add manual configuration

Update project configuration and dependencies

Remove project-dependent Processing Statistics section

Fix demo image display in README.md

Initial commit: Kotlin LSP Workspace Generator Plugin