docs: add and update docstrings

src/components/blocks/CourseBlock.tsx

@@ -22,10 +22,8 @@ interface Props {
 }
 
 /**
- *
- * Component `CourseBlock` displays a overview of a course in `DictionaryPage`.
+ * Component `CourseBlock` displays an overview of a course within the search results on the `DictionaryPage`.
  * It shows the title, classification, professors, and description of the course.
- *
  */
 const CourseBlock: React.FC<Props> = ({
   t,

src/components/blocks/CourseSimpleBlock.tsx

@@ -8,6 +8,10 @@ interface Props {
   course: Course;
 }
 
+/**
+ * Component `CourseSimpleBlock` displays a brief overview of a course within the `CourseRelatedCoursesSubSection` on the `DictionaryPage`.
+ * It shows the title and code of the course.
+ */
 const CourseSimpleBlock: React.FC<Props> = ({ course }) => {
   const translate = useTranslatedString();
 

src/components/blocks/PlannerCourseBlock.tsx

@@ -17,6 +17,10 @@ interface Props {
   addToPlanner: (course: Course | ArbitraryPseudoCourse) => void;
 }
 
+/**
+ * Component `PlannerCourseBlock` displays an overview of a course within the search results on the `PlannerPage`.
+ * It shows the title, classification, and code of the course.
+ */
 const PlannerCourseBlock: React.FC<Props> = ({
   t,
   course,

src/components/blocks/ProjectBlock.tsx

@@ -14,10 +14,8 @@ interface Props {
 }
 
 /**
- *
- * Component `ProjectBlock` displays an overview of a project in `CreditPage`.
+ * Component `ProjectBlock` displays an overview of a project on the `CreditPage`.
  * It shows the title, subtitle, and period of the project.
- *
  */
 const ProjectBlock: React.FC<Props> = ({ project, isRaised, onClick }) => {
   const handleClick = onClick