Add method to fetch content of works (#130)

* add getWorkContent

* await tests

* fix with better comments

* polish up structure

* use chapterId instead of number

* remove or null from content

* Make content always non-null

* make comments accurate

Author: essential-randomness

package-lock.json

@@ -53,6 +53,7 @@
     "@vitest/coverage-v8": "3.2.4",
     "directory-tree": "^3.3.0",
     "filenamify": "^6.0.0",
+    "htmlfy": "^1.0.0",
     "msw": "^2.0.11",
     "ts-node": "^10.4.0",
     "tsx": "^4.19.2",