cleanup `@ts-nocheck`

[zaucy]

there were several files I added @ts-nocheck to during the #119 update due to the upgrade causing those files to fail to compile

• src/search/search.service.ts
• src/search/doxygen-parse.ts
• src/components/layout/content/content.component.ts
• src/components/code-block-variation/code-block-variation.component.ts
• src/components/code-block-variation/code-block-variation-option.directive.ts
• src/components/layout/sidenav-section/sidenav-section.component.ts
• src/components/search/search.component.ts
• src/app/roadmap/roadmap.component.ts
• src/app/reference/repo-ref/repo-ref.component.ts
• src/components/ecsact-wasm-system-impl-validator/ecsact-wasm-system-impl-validator.component.ts