Update @nestjs/swagger to v8

[fityannugroho]

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What kind of change does this PR introduce?

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• Bug fix
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What is the current behavior?

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What is the new behavior?

This pull request includes several updates and improvements to the project dependencies and codebase, primarily focusing on upgrading package versions and removing unused decorators. The most important changes include upgrading @nestjs/swagger and swagger-ui-dist, as well as removing the @ApiTags decorator from various controllers.

@ApiTags now use controller name by default (nestjs/swagger#3011)

Dependency updates:

• package.json: Upgraded @nestjs/swagger from version 7.4.2 to 8.0.7.
• pnpm-lock.yaml: Upgraded @nestjs/swagger from version 7.4.2 to 8.0.7 and swagger-ui-dist from version 5.17.14 to 5.18.2. [1] [2] [3] [4] [5]

Codebase simplification:

• src/app.controller.ts: Removed the @ApiTags decorator.
• src/district/district.controller.ts: Removed the @ApiTags decorator. [1] [2]
• src/island/island.controller.ts: Removed the @ApiTags decorator. [1] [2]
• src/province/province.controller.ts: Removed the @ApiTags decorator. [1] [2]
• src/regency/regency.controller.ts: Removed the @ApiTags decorator. [1] [2]
• src/village/village.controller.ts: Removed the @ApiTags decorator. [1] [2]

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