fix(linter/plugins): define RegExp.escape for tsc

[overlookmotel]

Fix a couple of errors that get flagged by TypeScript in VS Code, because it doesn't recognise RegExp.escape. Oxlint's typecheck doesn't flag it (presumably tsgo is aware of this new addition to the language), but it's still annoying having red squiggles in VS Code. This PR fixes that.

[overlookmotel]

• fix(linter/plugins): define RegExp.escape for tsc #20077 👈 (View in Graphite)
• docs(linter/plugins): move comment about "bivariance hack" into generated code #20082
• fix(linter/plugins): fix types for walkProgram and walkProgramWithCfg #20081
• refactor(linter/plugins): debug assert that values passed via NAPI are not undefined #20070
• refactor(linter/plugins): clarify types #20069
• test(linter/plugins): add types test for VisitorObject #20066
• refactor(linter/plugins): enable TS strict option #19675
• fix(linter/plugins): fix type definition for VisitorObject #20065
• main

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[camc314]

I don't think we need this - tsgolint ships with es2025 types

[Copilot]

Copilot wasn't able to review any files in this pull request.

[overlookmotel]

I don't think we need this - tsgolint ships with es2025 types

Rationale is explained in PR description that I just added. Personally I think it's worthwhile, but if you disagree, feel free to close this - I don't care enough to argue!