RoosterJs Content Model 0.22.0

Build a standalone editor based on Content Model

• Port selection API (#2229, #2235, #2266)
• Port UndoPlugin and Undo API (#2237, #2249)
• Port event core API (#2254)
• Port transformColor API (#2256)
• Port CopyPastePlugin (#2257)

Content Model improvement

• Set readonly for new entity (#2243)
• Allow pasting Excel table without adding borders (#2247)
• Do not add entity delimiter to editable entity (#2252)
• Create list in an indented paragraph (#2255)
• Remove whole list when delete (#2248)
• Do not set focus to editor when format if editor did not have focus before format (#2259)
• Copy cell dataset when inserting new row/column (#2264)
• Fix table row inserter for wide border (#2263)
• Fix bug: The size of the pasted table becomes larger (#2268)
• Remove comment highlight when pasting Content from Word Online (#2272)
• Delete Image format (#2271)
• Preserve Word Desktop List style (#2269)
• Do not handle enter input on mac (#2301)

Other improvement

• Fix demo site issue (#2258)