Added a lecture

[maldron0309]

What does this PR do?

Add resource(s) | Remove resource(s) | Add info | Improve repo
Add info

For resources

Description

Added a lecture platform and added Cotlin and Svelte lectures.

Why is this valuable (or not)?

Added a lecture

How do we know it's really free?

yes

For book lists, is it a book? For course lists, is it a course? etc.

course

Checklist:

• Read our contributing guidelines.
• Search for duplicates.
• Include author(s) and platform where appropriate.
• Put lists in alphabetical order, correct spacing.
• Add needed indications (PDF, access notes, under construction).
• Used an informative name for this pull request.

Follow-up

• Check the status of GitHub Actions and resolve any reported warnings!

[github-actions]

Linter failed, fix the error(s):

free-programming-books/courses/free-courses-ko.md
112:1-113:101  warning  Alphabetical ordering: swap l.113 and l.112  alphabetize-lists  remark-lint

[github-actions]

Linter failed, fix the error(s):

free-programming-books/courses/free-courses-ko.md
112:1-113:127  warning  Alphabetical ordering: swap l.113 and l.112  alphabetize-lists  remark-lint