Implement very basic widget inspector #2590

Job	Run time
cargo check (msrv) (wasm32)	17s
cargo check (msrv) (wasm32)	17s
cargo clippy (windows-latest)	5m 1s
cargo clippy (windows-latest)	5m 1s
cargo check (aarch64-android)	26s
cargo check (aarch64-android)	26s
cargo clippy (macos-latest)	2m 54s
cargo clippy (macos-latest)	2m 54s
cargo check (msrv) (windows-latest)	1m 41s
cargo check (msrv) (windows-latest)	1m 41s
cargo clippy (wasm32)	2m 4s
cargo clippy (wasm32)	2m 4s
cargo clippy (ubuntu-latest)	3m 16s
cargo clippy (ubuntu-latest)	3m 16s
cargo check (msrv) (macos-latest)	44s
cargo check (msrv) (macos-latest)	44s
cargo doc	1m 57s
cargo doc	1m 57s
cargo check (msrv) (ubuntu-latest)	36s
cargo check (msrv) (ubuntu-latest)	36s
formatting	32s
formatting	32s
Prime LFS Cache	4s
Prime LFS Cache	4s
cargo test (wasm32)	19s
cargo test (wasm32)	19s
typos	6s
typos	6s
cargo test (windows-latest)	3m 6s
cargo test (windows-latest)	3m 6s
cargo test (macos-latest)	2m 15s
cargo test (macos-latest)	2m 15s
cargo test (ubuntu-latest)	50s
cargo test (ubuntu-latest)	36s
	52m 2s

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