Migrate manifestV2 to manifestV3

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Chrome will not support manifestV2 since 2023.

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• No longer use chrome://favicon/[host_url] as the default icon, cause protocol chrome is invalid since mv3

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• Create context menu items after installed/update cause errors occuring via mv3
  

see https://stackoverflow.com/a/64318706

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Published since v1.0.3 for Chrome

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• background.js does not work after re-enbled in Linux. Seem to be ok in Mac.

@see https://bugs.chromium.org/p/chromium/issues/detail?id=1271154#c52

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Published in Edge since v1.1.7

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Statistics are inaccurate cause of service worker.

• Need reconstruct the timer, keep statistics operation in the content script.
• Replace setInterval() with chrome.alarms API, setInteval does not work in service worker.

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Published in Chrome since v1.2.4
Published in Edge since v1.2.5

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Use content script to stat time