docs: add funded by netidee link

This fixes an issue where the contentSize of of the autosize virtual scroll strategy is being calculated wrong after the resize observer emitted its first event.

…ize-not-using-tombstone-size

fix(template): using tombstoneSize for non-cached items with 0 height

* chore(deps): update nx to v21.2.0 & angular to v20.0.3

* chore(template): refactor imports for zoneless cd; fix tests

* chore(template): fix tests

* refactor(template): enhance unpatch directives for zoneless support

* refactor(template): fix tests

* test: Fix `NG0204: Can't resolve all parameters for TemplateRef: (?, ?, ?)

https://cloud.nx.app/runs/RKoxUB9h0R/task/template%3Atest

From all I know, it isn't needed to provide core Angular "providers" unless you want to explicitly overwrite it with some custom implementation.

* chore: fix test formatting

* test(template): fix for signal tests

* test(template): fix let directive tests

* chore: formatting

* chore(docs): fix link

* chore: upgrade markdown-link-check

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Co-authored-by: Enea Jahollari <jahollarienea14@gmail.com>
Co-authored-by: Julian Jandl <julian@jandl.wien>

BREAKING CHANGE: bump ng to version 20

BREAKING CHANGE: bump ng to version 20

BREAKING CHANGE: bump ng to version 20

chore: upgrade deprecated github pages actions

feat: prepare v20 release