Add ESBuild for minification

[NullVoxPopuli]

No description provided.

[NullVoxPopuli]

from $ TAILWIND_MODE=build ember build --environment=production(very small app, one route)
Before

37.41s

Built project successfully. Stored in "dist/".
File sizes:
 - dist/assets/chunk.6080b23d1b1d69f38f9d.js: 228.25 KB (65.35 KB gzipped)
 - dist/assets/chunk.d60415d57fdc996ec57e.js: 21.36 KB (5.88 KB gzipped)
 - dist/assets/liquidity-pools.css: 19.85 KB (5.97 KB gzipped)
 - dist/assets/liquidity-pools.df130710659cecda30fe725a093d2ae6.css: 9.28 KB (2.64 KB gzipped)
 - dist/assets/vendor.39fa57c8e0a2b054e888e4caae13742a.js: 1.66 MB (567.63 KB gzipped)
 - dist/assets/vendor.47e5b13a6c66903c00db8ae984063008.css: 5.9 KB (1.4 KB gzipped)
Done in 37.41s.

29.94s

Built project successfully. Stored in "dist/".
File sizes:
 - dist/assets/chunk.6080b23d1b1d69f38f9d.js: 228.25 KB (65.35 KB gzipped)
 - dist/assets/chunk.d60415d57fdc996ec57e.js: 21.36 KB (5.88 KB gzipped)
 - dist/assets/liquidity-pools.css: 19.85 KB (5.97 KB gzipped)
 - dist/assets/liquidity-pools.df130710659cecda30fe725a093d2ae6.css: 9.28 KB (2.64 KB gzipped)
 - dist/assets/vendor.39fa57c8e0a2b054e888e4caae13742a.js: 1.66 MB (567.63 KB gzipped)
 - dist/assets/vendor.47e5b13a6c66903c00db8ae984063008.css: 5.9 KB (1.4 KB gzipped)
Done in 29.94s.

28.96s

Built project successfully. Stored in "dist/".
File sizes:
 - dist/assets/chunk.6080b23d1b1d69f38f9d.js: 228.25 KB (65.35 KB gzipped)
 - dist/assets/chunk.d60415d57fdc996ec57e.js: 21.36 KB (5.88 KB gzipped)
 - dist/assets/liquidity-pools.css: 19.85 KB (5.97 KB gzipped)
 - dist/assets/liquidity-pools.df130710659cecda30fe725a093d2ae6.css: 9.28 KB (2.64 KB gzipped)
 - dist/assets/vendor.39fa57c8e0a2b054e888e4caae13742a.js: 1.66 MB (567.63 KB gzipped)
 - dist/assets/vendor.47e5b13a6c66903c00db8ae984063008.css: 5.9 KB (1.4 KB gzipped)
Done in 28.96s.

After

31.36s

Built project successfully. Stored in "dist/".
File sizes:
 - dist/assets/chunk.12a678c236ec95652eaf.js: 228.26 KB (65.38 KB gzipped)
 - dist/assets/chunk.fc75b1bce77fa34e23db.js: 21.38 KB (5.91 KB gzipped)
 - dist/assets/liquidity-pools.css: 19.85 KB (5.97 KB gzipped)
 - dist/assets/liquidity-pools.df130710659cecda30fe725a093d2ae6.css: 9.28 KB (2.64 KB gzipped)
 - dist/assets/vendor.39fa57c8e0a2b054e888e4caae13742a.js: 1.66 MB (567.63 KB gzipped)
 - dist/assets/vendor.47e5b13a6c66903c00db8ae984063008.css: 5.9 KB (1.4 KB gzipped)
Done in 31.36s.

24.49s

Built project successfully. Stored in "dist/".
File sizes:
 - dist/assets/chunk.12a678c236ec95652eaf.js: 228.26 KB (65.38 KB gzipped)
 - dist/assets/chunk.fc75b1bce77fa34e23db.js: 21.38 KB (5.91 KB gzipped)
 - dist/assets/liquidity-pools.css: 19.85 KB (5.97 KB gzipped)
 - dist/assets/liquidity-pools.df130710659cecda30fe725a093d2ae6.css: 9.28 KB (2.64 KB gzipped)
 - dist/assets/vendor.39fa57c8e0a2b054e888e4caae13742a.js: 1.66 MB (567.63 KB gzipped)
 - dist/assets/vendor.47e5b13a6c66903c00db8ae984063008.css: 5.9 KB (1.4 KB gzipped)
Done in 24.49s.

23.95s

Built project successfully. Stored in "dist/".
File sizes:
 - dist/assets/chunk.12a678c236ec95652eaf.js: 228.26 KB (65.38 KB gzipped)
 - dist/assets/chunk.fc75b1bce77fa34e23db.js: 21.38 KB (5.91 KB gzipped)
 - dist/assets/liquidity-pools.css: 19.85 KB (5.97 KB gzipped)
 - dist/assets/liquidity-pools.df130710659cecda30fe725a093d2ae6.css: 9.28 KB (2.64 KB gzipped)
 - dist/assets/vendor.39fa57c8e0a2b054e888e4caae13742a.js: 1.66 MB (567.63 KB gzipped)
 - dist/assets/vendor.47e5b13a6c66903c00db8ae984063008.css: 5.9 KB (1.4 KB gzipped)
Done in 23.95s.

[NullVoxPopuli]

Bigger app: https://github.com/ember-learn/ember-website

time ember build --environment=production

results pending... having issues 🙃

[NullVoxPopuli]

I think I've determined this has no effect.
And any difference in results are due to my test machine being unstable (and too few data points).

@ef4, it seems that no matter what ember-auto-import generates, it's ran through broccoli-terser-sourcemap, which means we can close this PR in favor of: ember-cli/ember-cli#9693