layout: Add support for white-space-collapse: break-spaces (#32388)

This change adds support for `white-space-collapse: break-spaces` and
adds initial parsing support for `overflow-wrap` and `word-break`. The
later two properties are not fully supported, only in their interaction
with `break-spaces`. This is a preliminary change preparing to implement
them.

In addition, `break_and_shape` is now forked and added to Layout 2020.
This function is going to change a lot soon and forking is preparation
for this. More code that is only used by Layout 2013 is moved from `gfx`
to that crate.

Co-authored-by: Rakhi Sharma <atbrakhi@igalia.com>

components/layout/lib.rs

@@ -36,6 +36,7 @@ mod table_row;
 mod table_rowgroup;
 mod table_wrapper;
 mod text;
+mod text_run;
 pub mod traversal;
 pub mod wrapper;