Updates JS, Go, Python and Actions dependencies, including the stylelint
18 and stylelint-config-recommended 19 majors.
- Update clippie to 4.3.1, which fixes copy buttons in browsers without
`ClipboardItem` such as Pale Moon
- Exempt the markup `tt` selectors from the new `selector-no-deprecated`
rule, the sanitizer allows `<tt>`
- Replace the `stylelint-value-no-unknown-custom-properties` plugin with
stylelint's `referenceFiles` and the core `no-unknown-*` rules
- Remove dead dropdown loading icon styles that referenced deleted
keyframes
Fixes: https://github.com/go-gitea/gitea/issues/40287
Assisted-by: Claude Code:claude-opus-5-5
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Co-authored-by: silverwind <me@silverwind.io>