feat(djot): update queries (#6375)

- Adjust some highlights to fit context better
- Conceal inline content
- Add locals
- Add folds

queries/djot/indents.scm

@@ -0,0 +1,10 @@
+; The intention here is to rely on Neovims `autoindent` setting.
+; This allows us to not indent after just a single list item
+; so we can create narrow lists quickly, but indent blocks inside list items
+; to the previous paragraph.
+(list_item_content) @indent.auto
+
+(footnote_content) @indent.align
+
+((table_caption) @indent.begin
+  (#set! indent.immediate 1))