Validate user tag parameters

[angelozerr]

Validate user tag parameters

Fixes #788

Signed-off-by: azerr azerr@redhat.com

[angelozerr]

Here a demo:

[angelozerr]

@FroMage I think this PR could interest you, see the demo at https://github.com/redhat-developer/quarkus-ls/pull/791#issuecomment-1426640254

[angelozerr]

This PR improves too the completion which doesn't show data model completion (ex : uri:Login) when:

• user tag doesn't have it (ex: #input)
• user tag have it (ex: #form) but it is already declared in the template

Here a demo:

[FroMage]

Look great!