Sentence casing part 1

[efb4f5ff-1298-471a-8973-3d47447115dc]

Pull Request Type

• Chore

Related issue

#5000

Description

This PR is drafted because i'd like to reach a consensus on the changes first before i change all the related files

Notable changes:
https://github.com/efb4f5ff-1298-471a-8973-3d47447115dc/FreeTube/blob/5c7be48e038b60e32366ca591bcf8c1f65e351b9/static/locales/en-US.yaml#L4-L26 is made the same as browser and other Electron application menu bars

General rules of thumb im adhering to in all my PR's:

• Apply proper punctuation when using multiple sentences to both the key and value
• Remove punctuation when using one sentence (95% already does this so i just make it consistent)
• Apply proper casing to abbreviations if its being used already to both the key and value
• Apply proper casing when a specific setting or button is being named in a message (e.g. If you want to import your subscriptions you can go to **Data settings** and select **Import subscriptions** or you can search for a channel and subscribe to them.)

Testing

Look around in the UI to check that sentence casing has been applied properly

Desktop

• OS: Windows 11
• OS Version: 24H2