Add "resume watching" functionality

[mykhailodanilenko]

🚀 Description

this PR adds "resume watching" functionality as described in #69. the latest history entry is put on the homepage and all videos are now opened from latest watched position. also, you can specify the time from when you want to start watching with the optional "timestamp" url param (time is in seconds). See deployed at https://mykhailodanilenko.github.io/web-client/

📄 Motivation and Context

69

🧪 How Has This Been Tested?

web version

📦 Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)

✅ Checklist (copied from README)

• [x] Squash your changes into a single clear and thoroughly descriptive commit, split changes into multiple commits only when it contributes to readability
• [x] Reference the GitHub issue that you are contributing on in your commit title or body
• [x] Sign your commits, as this is required by the automated GitHub PR checks
• [x] Ensure that the changes adhere to the project code style and formatting rules by running npx eslint . and npx prettier --check ../ from the ./OwnTube.tv/ directory (without errors/warnings)
• [x] Include links and illustrations in your pull request to make it easy to review
• [x] Request a review by @ar9708, @OGTor, @tryklick and @mblomdahl

[mykhailodanilenko]

we can close #75 with the merge of this one as it implements the timestamp url param