canvas: Implement strokeText (#39183)

Mostly it's just reusing/copy&edit fillText stuff.

Testing: Existing WPT tests
Fixes: #29973

Try run: https://github.com/sagudev/servo/actions/runs/17511337550

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Signed-off-by: sagudev <16504129+sagudev@users.noreply.github.com>

components/canvas/lib.rs

@@ -3,6 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 #![deny(unsafe_code)]
+#![allow(clippy::too_many_arguments)]
 
 mod backend;