[FEATURE] add sticky comment support

[lizheming]

fix #307

[Mister-Hope]

Since the comment are loaded as clips, sticky comment should be returned under the first comment list request. And I see that in this PR, so just to make sure, do I need to do anything more to sort the return comment list? Or just rendering it as is?

[lizheming]

Since the comment are loaded as clips, sticky comment should be returned under the first comment list request. And I see that in this PR, so just to make sure, do I need to do anything more to sort the return comment list? Or just rendering it as is?

Comment list api will export sorted comments data, so client do not need do it.

waline/packages/server/src/controller/comment.js

Lines 200 to 208 in 222dc69

	rootComments.sort((cmtA, cmtB) => {
	if (cmtA.sticky) {
	return 1;
	}
	if (cmtB.sticky) {
	return -1;
	}
	return 0;
	});

[Mister-Hope]

Should be ready ( not fully tested)