chore(demo): `TextfieldController` mark as legacy

[mdlufy]

Fixes #

[lumberjack-bot[bot]]

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BundleMon

Unchanged files (5)

Status | Path | Size | Limits :------------: | ------------ | :------------: | :------------: :white_check_mark: | demo/browser/main.(hash).js
| 292.35KB | +10% :white_check_mark: | demo/browser/vendor.(hash).js
| 247.33KB | +10% :white_check_mark: | demo/browser/runtime.(hash).js
| 42.86KB | +10% :white_check_mark: | demo/browser/styles.(hash).css
| 16.27KB | +10% :white_check_mark: | demo/browser/polyfills.(hash).js
| 11.18KB | +10%

No change in files bundle size

Unchanged groups (1)

Status | Path | Size | Limits :------------: | ------------ | :------------: | :------------: :white_check_mark: | demo/browser/*..js
| 7.1MB | -

Final result: :white_check_mark:

View report in BundleMon website ➡️

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