Code cleaning

[LittleLittleCloud]

Update on 2024/02/1 (code: Bob, warning to resolve: 101)

• resolve VSSDK*

Update on 2024/01/22 (code: Alice, warning to resolve: 63)

• resolve CS0067
• resolve CS0108
• resolve CS0162
• resolve CS0168
• resolve CS0169
• resolve CS0219

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• enable formatter check
• reduce IDE0055 (format error)
• reduce IDE0005 (unused using)
• reduce MSB3277
• reduce MSB3270