internal(browser): Add Clear input action

[going-confetti]

Description

• Add Clear input action
• ⚠️ Action options are not a part of this PR

How to Test

• Add a new Clear input action
• Configure the locator
• Verify that the action has matching code in the script

Checklist

• I have performed a self-review of my code.
• I have added tests for my changes.
• I have commented on my code, particularly in hard-to-understand areas.

Related PR(s)/Issue(s)

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Note

Low Risk
Low risk: adds a new UI action and codegen path for locator.clear without changing existing action semantics or security-sensitive logic.

Overview
Adds a new Clear input browser action (locator.clear) to the Browser Test Editor, including UI/editor wiring (menu entry, icon, default locator suggestions, and a ClearActionBody locator form).

Extends the browser test graph/types and codegen pipeline to carry a new ClearExpression/ClearNode, connect it in the intermediate execution graph, and emit await locator.clear() in generated scenarios, including variable substitution and browser-scenario detection updates.

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[allansson]

LGTM! 👍