feat(plugins): allow prompts while resolving code actions (#2025)

Closes #1945

Resolving a lazy code action or file action dropped the invoking window, so a plugin couldn't ask the user anything (input, pick, confirm) while building its edit. Resolution now runs with that window, so prompts work during resolution; previews and Actions on Save never prompt, cancellation keeps the text unchanged, and stale edits are rejected. WIT and SDK docs describe the new behaviour; the released API surface is unchanged.

Co-authored-by: arnaud-ritti <[email protected]>

plugins/official/string-tools/dist/plugin.wasm.sources

@@ -1 +1 @@
-6a3d219b86eb112ee16aa846f97a17df4f3270ddfa90b5aa7ebe073b3a426d35
+343c6d46b9bf07f8631f16dbc737301a02a6b229b17eb0a455207509823680e1