feat(language-service): support converting to signal queries in VSCode extension - #58106

…ing TCB information (#58106)

Whenever information is requested from the template checker right now,
the shim is only ensured to be generated for the single file/component.
This is slow in migrations where we don't want to collect diagnostics,
but rather request information from the component state.

This commit supports `OptimizeFor` in `checker#getTemplate`.

PR Close #58106

)

Instead of inspecting all types of property accesses, we can use a
similar optimization we did for TS references— leveraging the list of
known field names to minimize type checker calls.

PR Close #58106

…e extension (#58106)

This commit adds support for converting decorator queries to signal queries
via the VSCode extension.

Note that this is not fully finished as we still need to add better
messaging when certain fields could not be migrated.

In addition, it's worth noting that the migration is not as safe as the
input migration because commonly query lists are passed around— this
quickly can break the build— but is an acceptable trade-off for the work
saved. A migration cannot be 100% correct in general; there are always
edge-cases.

PR Close #58106