Migrating from Manifest V3 to V2

migrating from Manifest V3 to V2 to use background textarea dom ( polling clipboard and paste to the dom )
Because, copy event listener is not working in some pages ( google docs, spread sheets, notion, etc.. )

Improve notes grid rendering

before : It renders each note and calculates grid height, therefore total rendering count is twice the number of
the notes.

after : It renders all notes and calculates grid heights, then re-renders
all notes, therefore the total rendering count is just two. But, the first
rendering is opacity 0. So, only the second rendering is shown to the user

Floating popup mode, Pinned notes

1. detached popup from browser ( but, popup is also browser )
2. pinned notes which are not removed even if the user try to remove them
3. can save the web page url. click right on empty space in the web
4. google spread sheet copy logic added ( * google docs, presentation not supported now )

Publish to chrome webstore

1. texts, links and images can be copied to the clipboard.
2. can copy the stored memo from the clipboard
3. can remove or restore memos
4. settings (language, auto copy, numbers of lines)