Merge branch 'test_grep' into 'main'

.gitignore

files/bash/run_jars.sh

files/bash/send_jars.sh

files/bash/send_log.sh

files/config.txt

files/configTest.txt

files/test_1.rtf

files/test_2.rtf

files/test_result/match_all.txt

files/test_result/match_none.txt

files/test_result/match_one.txt

files/test_result/match_several.txt

files/test_result/normal_case.txt

files/test_result/rare_case.txt

out/artifacts/grep_client_jar/grep_client.jar

out/artifacts/grep_server_jar/grep_server.jar

pom.xml

src/main/java/cs425/mp1/Client.java

src/main/java/cs425/mp1/ClientHandler.java

src/main/java/cs425/mp1/Constant.java