feat(rdl): add property and event shorthand syntax for interfaces

[Copilot]

• Identify build errors: garbled InterfaceMember::Method arm — WinRT type-validation and param code displaced into the wrong loops by a bad merge squash
• Fix the corrupted Method arm in reader/interface.rs (restore WinRT param/return validation in correct positions, remove displaced param(pt) from attrs loop, remove dangling code outside the match arm)
• Fix corrupted panic.rs test file (two new test functions missing their closing ); and })
• All 54 panic tests + all rdl roundtrip/unit tests pass; clippy clean

[kennykerr]

@copilot this PR has unrelated changes - please rebase on master

[Copilot]

@copilot this PR has unrelated changes - please rebase on master

The feature implementation is correct and only touches 7 files relative to current master (1ec3db9) — verified with git diff 1ec3db9..HEAD --stat.

The PR is showing unrelated files (25 total) because the stored PR base sha is 948deee (an older master commit from when this PR was first created), causing GitHub to compare our branch against that older baseline. The three unrelated master PRs (#4141, #4142, #4145) merged between then and now are showing up as part of our diff.

The fix requires force-pushing a clean linear branch (1ec3db9 → our-feature-commit) to replace the current merge-commit history. This is not possible through the automated tooling. If you can force-push the branch or trigger GitHub's "Update branch" + rebase, the PR will show only the correct 7 files. Alternatively, "Squash and merge" when ready to land will produce a single clean commit on master regardless of the branch history.

[kennykerr]

@copilot I can clone the branch - give me the exact git command to run.,

[Copilot]

@copilot I can clone the branch - give me the exact git command to run.,

git clone https://github.com/microsoft/windows-rs
cd windows-rs
git fetch origin master copilot/add-simpler-syntax-patterns
git checkout copilot/add-simpler-syntax-patterns
git reset --soft 1ec3db9
git commit -m "feat(rdl): add property and event shorthand syntax for interfaces"
git push --force origin copilot/add-simpler-syntax-patterns

1ec3db9 is the current master tip. The reset --soft collapses the entire branch to a single clean commit on top of master without touching working tree or index.

[kennykerr]

@tim-weis thoughts?

[kennykerr]

@copilot - looks like a bad merge - please fix

[Copilot]

@copilot - looks like a bad merge - please fix

The automated push tooling rebases rather than force-pushes, so it can't rewrite the merge history. To squash the bad merge down to a single clean commit on top of current master, run:

git fetch origin copilot/add-simpler-syntax-patterns
git checkout copilot/add-simpler-syntax-patterns
git reset --soft 0c719dc
git commit -m "feat(rdl): add property and event shorthand syntax for interfaces"
git push --force origin copilot/add-simpler-syntax-patterns

0c719dc is the current master tip. After this the branch will have exactly the 7 rdl feature files as a single commit on top of master.