build: prepare 0.31.1 patch release (microsoft#1660)

* Prepare 0.31.1 patch release

Bump the extension version to 0.31.1 and document the VSIX packaging fix for the patch release.

* Document 0.31.1 patch fixes

Add the notable fixes merged after 0.31.0 to the 0.31.1 changelog entry.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Refine 0.31.1 changelog

Keep the patch release notes focused on user-facing fixes.

build: Prepare 0.31.0 release (microsoft#1626)

* Prepare 0.31.0 release

* Update 0.31.0 changelog

* Refine 0.31.0 changelog

* Trim 0.31.0 changelog

docs: release 0.30.5 (microsoft#1539)

fix: update the project uri (microsoft#1520)

* fix: fix the project uri

* fix: update

docs: add changelog for 0.30.3 (microsoft#1506)

Release 0.30.0 (microsoft#1490)

* chore: release 0.30.0

* docs: remove infra-related PRs

Bump node version to 20 (microsoft#1381)

Add vsix sign (microsoft#1375)