We already include the inheritance for each property in Properties.json,
so made sense to use that instead of a list in StyleResolver.
Added `inherited: true` to a couple of properties to match the previous
code's behavior. One of those had a FIXME which I've moved to the JSON
file, which is hacky, but it works.
SPDX License Identifiers are a more compact / standardized
way of representing file license information.
See: https://spdx.dev/resources/use/#identifiers
This was done with the `ambr` search and replace tool.
ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
These are properties that may used internally by LibWeb when resolving
style values, but may not be set by external stylesheets. For example,
'background-repeat' may be a two-value CSS property that internally
translates to 'background-repeat-x' and 'background-repeat-y'.
(...and ASSERT_NOT_REACHED => VERIFY_NOT_REACHED)
Since all of these checks are done in release builds as well,
let's rename them to VERIFY to prevent confusion, as everyone is
used to assertions being compiled out in release.
We can introduce a new ASSERT macro that is specifically for debug
checks, but I'm doing this wholesale conversion first since we've
accumulated thousands of these already, and it's not immediately
obvious which ones are suitable for ASSERT.
