chore: Create content.ts for wxt-demo as example

[PatrykKuniczak]

Overview

Added new file with tests, to show #2232 really fix the problem.

Manual Testing

Let's check if everything is shown in console for each browser target in packages/wxt-demo

Blocked by #2232

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 76.43%. Comparing base (98e2180) to head (f95b95a).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2233      +/-   ##
==========================================
+ Coverage   76.17%   76.43%   +0.25%     
==========================================
  Files         115      115              
  Lines        3094     3094              
  Branches      685      685              
==========================================
+ Hits         2357     2365       +8     
+ Misses        655      648       -7     
+ Partials       82       81       -1     

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[pkg-pr-new]

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@wxt-dev/analytics

npm i https://pkg.pr.new/@wxt-dev/analytics@2233

@wxt-dev/auto-icons

npm i https://pkg.pr.new/@wxt-dev/auto-icons@2233

@wxt-dev/browser

npm i https://pkg.pr.new/@wxt-dev/browser@2233

@wxt-dev/i18n

npm i https://pkg.pr.new/@wxt-dev/i18n@2233

@wxt-dev/is-background

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@wxt-dev/module-react

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@wxt-dev/module-solid

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@wxt-dev/module-svelte

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@wxt-dev/module-vue

npm i https://pkg.pr.new/@wxt-dev/module-vue@2233

@wxt-dev/runner

npm i https://pkg.pr.new/@wxt-dev/runner@2233

@wxt-dev/storage

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@wxt-dev/unocss

npm i https://pkg.pr.new/@wxt-dev/unocss@2233

@wxt-dev/webextension-polyfill

npm i https://pkg.pr.new/@wxt-dev/webextension-polyfill@2233

wxt

npm i https://pkg.pr.new/wxt@2233

commit: f95b95a

[PatrykKuniczak]

Really fu.. those tests, it's too complicated for that simply case, example code'll be enough.

It's doable, but anyway MV2 support will end soon also for Firefox and then we'll need to support only MV3.