[Test] Add UI testing

[grgprarup]

• setup UI test test: setup e2e test #28
• Test scenarios for UI Test

1. Opening a markdown file and viewing in the presentation viewer
   • check if markdown is rendered properly according to their tags (eg.: #-> <h1>) test: add e2e test for markdown rendering #49 (Not required in e2e)
   • check for the content of the slide Test: check content of currently open slide #108
     - [ ] number of slides is correct >/del> => Not implemented the feature to count the number of pages yet
2. Test slide change test: add test for changing slide using ui buttons and keyboard actions #120
   • with button on UI
   • with keyboard
3. Test coverage for:
   • [bug] Open in Presentation Viewer from Sidebar #11
   • [bug] Reopening the file doesn't load the slide content #13

• UI tests in CI (ci: setup e2e ci pipeline #51)

[anon-pradip]

Test scenarios for UI Test

1. Opening a markdown file and viewing in the presentation viewer
   • check if markdown is rendered properly according to their tags (eg.: #-> <h1>)
   • check for the content of the slide
   • number of slides is correct
2. Test slide change
   • with button on UI
   • with keyboard
3. Test coverage for:
   • [bug] Open in Presentation Viewer from Sidebar #11
   • [bug] Reopening the file doesn't load the slide content #13

[individual-it]

@anon-pradip what else has to happen here, or can we close this?

[anon-pradip]

@anon-pradip what else has to happen here, or can we close this?

I am working on it