chore: modify project structure & cleanup ci and gitignore #98

Job	Run time
application-sveltekit	14s
application-hertzbeat	3m 21s
basic (mybatis, java, true) / ci	1m 30s
basic (go-sql-driver, golang, true) / ci	1m 32s
basic (mysql-connector-java, java, true) / ci	1m 36s
basic (mybatis-plus, java, false) / ci	1m 53s
basic (pymysql, python, true) / ci	1m 22s
basic (oceanbase-client, java, true) / ci	1m 42s
basic (mysql-connector-python, python, true) / ci	1m 25s
basic (spring-jdbc, java, true) / ci	1m 38s
basic (testcontainers-java, java, false) / ci	1m 45s
basic (springboot, java, true) / ci	1m 44s
	19m 42s

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