chore: prepare v9.0.0-rc.4

[susnux]

Lets do another RC with fixed date time picker

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🚀 Enhancements

• feat: add useFormatRelativeTime composable by @susnux in feat: add useFormatRelativeTime composable #7067
• feat(NcPasswordField): allow to set visibility state by @susnux in feat(NcPasswordField): allow to set visibility state #7135
• feat(NcThemeProvider): allow to override the current theme for parts of the UI by @susnux in feat(NcThemeProvider): allow to override the current theme for parts of the UI #6764

🐛 Fixed bugs

• fix(NcActions + NcEmojiPicker): no focus-trap when needed, extra focus-trap when not by @ShGKme in fix(NcActions + NcEmojiPicker): no focus-trap when needed, extra focus-trap when not #7096
• fix(NcDateTimePicker): make clearable work by @raimund-schluessler in fix(NcDateTimePicker): make clearable work #7103
• fix(NcRichText): adjust markdown styles after migration by @Antreesy in fix(NcRichText): adjust markdown styles after migration #7106
• fix(NcActionText): remove br between action name and action long text by @GretaD in fix(NcActionText): remove br between action name and action long text #7116
• fix(NcNoteCard): too large icon padding by @raimund-schluessler in fix(NcNoteCard): too large icon padding #7118
• [main] fix(NcAppNavigationItem): TypeError: this.$refs.actions.$refs.menuButton is undefined by @backportbot[bot] in [main] fix(NcAppNavigationItem): TypeError: this.$refs.actions.$refs.menuButton is undefined #7143
• fix(useHotKey): try to derive latin keys from key codes of non-latin characters by @Antreesy in fix(useHotKey): try to derive latin keys from key codes of non-latin characters #7110
• style(NcRichText): consider reference widgets in markdown styles by @Antreesy in style(NcRichText): consider reference widgets in markdown styles #7142
• fix(NcDateTimePicker): correctly import library CSS by @raimund-schluessler in fix(NcDateTimePicker): correctly import library CSS #7051
• fix(NcListItem): correctly handle unmounting by @Antreesy in fix(NcListItem): correctly handle unmounting #7151
• perf(utils): ensure only 64px or 512px avatars are loaded by @susnux in perf(utils): ensure only 64px or 512px avatars are loaded #6749

Other Changes

• refactor: migrate reference widget related function to Typescript by @susnux in refactor: migrate reference widget related function to Typescript #6969
• chore(NcActions): fix type annotation of NodeList by @susnux in chore(NcActions): fix type annotation of NodeList #7060
• refactor(NcSettingsSection): migrate to Typescript and script-setup by @susnux in refactor(NcSettingsSection): migrate to Typescript and script-setup #7111
• refactor!: remove useFormatDateTime by @susnux in refactor!: remove useFormatDateTime #7129
• refactor!: make all events camelcase and drop deprecated events by @susnux in refactor!: make all events camelcase and drop deprecated events #7059
• chore(NcAppContent): rename NcAppDetailsContent to remove from docs by @susnux in chore(NcAppContent): rename NcAppDetailsContent to remove from docs #7137
• refactor(NcAppContent): clarify props documentation and use capabilities over initial state by @susnux in refactor(NcAppContent): clarify props documentation and use capabilities over initial state #7057