Add: add more const Key support

[vcaesar]

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Description

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Summary by CodeRabbit

• New Features
  • Added keyboard key constants for grave accent, double quote, and single quote characters to expand input handling capabilities.

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• key.go

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[Copilot]

Pull request overview

This PR extends the exported key-constant set in key.go to include additional printable keys (grave and quote variants), presumably to make KeyTap/KeyToggle usage more ergonomic and less error-prone for callers.

Changes:

• Reformats numeric key constants (Key0–Key9) for alignment/readability.
• Adds new exported constants for grave/backtick and quote characters.

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[Copilot]

KeyQuoter is declared as a rune constant ('"') rather than a string, while the surrounding key constants are strings. This will prevent using KeyQuoter anywhere a string is required (e.g., KeyTap(KeyQuoter) will not compile). Use a string literal for the double-quote character instead (e.g., an escaped " string).

Suggested change

	KeyQuoter = '"'
	KeyQuoter = "\""

[Copilot]

The name KeyQuoter is unclear/inconsistent next to KeyQuote (single quote). Consider renaming to something explicit like “double quote” to avoid confusion for API consumers.

Suggested change

	KeyGrave = "`"
	KeyQuoter = '"'
	KeyQuote = "'"
	KeyGrave = "`"
	KeyQuoter = '"' // legacy name for double quote
	KeyDoubleQuote = string('"') // clearer name for double quote
	KeyQuote = "'"

[Copilot]

There are existing unit tests asserting key constants (e.g., Key0, KeyA in robotgo_test.go). Adding assertions for the newly introduced constants (KeyGrave, the quote constants) would help catch accidental regressions in these exported API values.

Suggested change

	KeyQuoter = '"'
	KeyQuoter = `"`