Delay activation

[QuarticCat]

This PR changes activationEvents from onStartupFinished to onLanguage:tailwindcss, which will be generated automatically since VSCode 1.74, so omitted.

Reference: https://code.visualstudio.com/api/references/activation-events#onLanguage

[adamwathan]

Hey! Do you mind explaining the goal of this change? I don't know this codebase that well myself but I wonder if this presents an issue for people who aren't actually using the tailwindcss language mode at all, since this extension still needs to fire up to provide autocomplete in your HTML/Vue/JSX/whatever files.

[QuarticCat]

The intention here is to activate this extension by need. For example, when I work on a backend project, I don't want to start it. onStartupFinished is just too aggressive.

This extension still needs to fire up to provide autocomplete in your HTML/Vue/JSX/whatever files.

It's OK. We just need to provide onLanguage:... for these languages in activationEvents. Here's an example from Vue's extension: https://github.com/vuejs/language-tools/blob/master/extensions/vscode/package.json#L24-L28

Feel free to close this PR since you know which languages to support better than me.