Display extensions as read only when incompatible with the selection

[ia3andy]

Description

• Add the relevant data to /api/extensions
• Display extensions as read only when incompatible with the selection
• Add a tooltip in the incompatible extensions explaining why they have been disabled and which extension is responsible.

[maxandersen]

What does "read only" mean ? Greyed out/disabled or ?

[ia3andy]

Both (Greyed out & Disabled)

[fbricon]

While looking into #1266, I found that some extensions have a minimum required java version, e.g. the Camel ones. Accessing https://code.quarkus.io/d?j=11&e=org.apache.camel.quarkus%3Acamel-quarkus-core&cn=code.quarkus.io yields:

Quarkus Command error > Some extensions are not compatible with the selected Java version (11):

• org.apache.camel.quarkus:camel-quarkus-core (min: 17)

However this restriction is not available when querying https://code.quarkus.io/api/extensions/stream/io.quarkus.platform:3.6?platformOnly=false

It'd be useful to have the min required Java version in that json payload, so that IDEs can also filter out incompatible extensions.