[Collection] Contributions from Ray

[Lei-Tin]

The following is a list of PRs that I have completed:

• Updated README.md #5
• [+] Added database connection gateway #16
• [*] Modified database gateway code to align with Improvement 1 #26
• [+] Added Unit tests for MySQLDatabaseGateway & Extra modifications within the class #31
• [+] Modified MySQLDatabaseGateway to allow splitBill feature #47
• [+] Included Javadocs, fixed Main.java for Mac, modified logic for getBillData, update README.md #50
• [+] Modifications on MySQLDatabaseGateway & added a SQL Script #62
• [*] Revamped MySQLDatabaseGateway and other major modifications to use cases #76
• [+] Updated README.md #95
• [+] Added an auto-release GitHub Actions Script #103
• [*] Removed warning of duplicated lines in IntelliJ #116

Issues that I have raised:

• [Improvement 2] Database Test cases and bug fixes #32
• [Improvement 3] Adding Javadoc everywhere #44
• [Documentation] Javadoc for BillUpdateUseCase @ScottCTD #53
• [Documentation] Javadoc for MySQLDatabaseGateway @Lei-Tin #54
• [Documentation] Javadoc for UserJoinUseCase @xgao28 #55
• [Documentation] Javadoc for InsertEntryUseCase @Yunshan-522 #56
• [Documentation] Javadoc for DeleteEntryUseCase @Ellen141319 #57
• [Documentation] Javadoc for AlterEntryUseCase @Yuhan-Ut #58
• [Improvement] Find ways to incorporate design patterns into our program #66
• [Improvement] Creating test cases for everything #67
• [Improvement] Use ComboBox for selecting currencies in BillTable #92
• [Improvement] Fix currency choices in ComboBox in addEntryDialog #93
• [Improvement] Change the shortcut keys for the menu items #94