necessary changes to switch to java server

.vscode/launch.json

.vscode/tasks.json

README.md

client/package-lock.json

client/package.json

client/src/test/completion.test.ts

client/src/test/diagnostics.test.ts

client/src/test/helper.ts

client/src/test/index.ts

client/src/test/runTest.ts

client/testFixture/completion.txt

client/testFixture/diagnostics.txt

client/tsconfig.json

package-lock.json

package.json

server/package-lock.json

server/package.json

server/src/errorHandler.ts

server/src/server.ts

server/src/wordCompletion.ts