WIP: Use ember-asset-size-action to report asset size changes to PRs

[Turbo87]

r? @locks

[github-actions]

Files that stayed the same size 🤷‍:

File	raw	gzip
auto-import-fastboot.js	0 B	0 B
cargo-fastboot.js	0 B	0 B
cargo.js	0 B	0 B
vendor.js	0 B	0 B
cargo.css	0 B	0 B
vendor.css	0 B	0 B

[github-actions]

Files that got Smaller 🎉:

File	raw	gzip
cargo.js	-12.9 kB	-1.44 kB

Files that stayed the same size 🤷‍:

File	raw	gzip
auto-import-fastboot.js	0 B	0 B
cargo-fastboot.js	0 B	0 B
vendor.js	0 B	0 B
cargo.css	0 B	0 B
vendor.css	0 B	0 B

[github-actions]

Size Change: -1.17 MB (399%) 🏆

Total Size: 292 kB

Filename	Size	Change
dist/assets/cargo-fastboot.js	3.1 kB	-521 B (16%)	👏
dist/assets/cargo.css	5.95 kB	-1.32 kB (22%)	🎉
dist/assets/cargo.js	39.3 kB	-24.4 kB (61%)	🏆
dist/assets/test-support.css	0 B	-2.37 kB (0%)
dist/assets/test-support.js	0 B	-154 kB (0%)
dist/assets/tests.js	0 B	-17.3 kB (0%)
dist/assets/vendor.css	1.66 kB	-1.37 kB (82%)	🏆
dist/assets/vendor.js	241 kB	-840 kB (347%)	🏆
dist/ember-fetch/fetch-fastboot.js	510 B	-596 B (116%)	🏆
dist/ember-svg-jar/static/css/main.f3aef49e.chunk.css	0 B	-4.55 kB (0%)
dist/ember-svg-jar/static/js/2.ced0fc45.chunk.js	0 B	-107 kB (0%)
dist/ember-svg-jar/static/js/main.0e7a56b1.chunk.js	0 B	-13.7 kB (0%)
dist/ember-svg-jar/static/js/runtime~main.a8a9905a.js	0 B	-762 B (0%)
dist/moment/fastboot-moment-timezone.js	131 B	-28 B (21%)	🎉
dist/moment/fastboot-moment.js	122 B	-32 B (26%)	🎉
dist/testem.js	0 B	-381 B (0%)

ℹ️ View Unchanged

Filename	Size	Change
dist/assets/auto-import-fastboot.js	20 B	0 B

_{compressed-size-action}

[locks]

What happened to the application template?

[Turbo87]

@locks I needed to delete something so that this PR actually shows a filesize diff 😉

[Turbo87]

given preactjs/compressed-size-action#2, I guess this is not as useful as I hoped it would be :-/