[FEATURE] Add support for wash app validate

[vados-cosmonic]

Affected project(s)

• documentation
• examples
• wasmCloud host
• wasmCloud CLI (wash)
• wasmCloud dashboard UI (washboard)
• capability providers
• provider bindgen
• control interface client
• other / not sure

Is your feature request related to a problem? Please describe.

When writing/building a WADM manifest, we should make it easier for people to validate whether the manifests have any obvious errors.

Like most other manifest formats, while the information is structurally checked, it is not semantically checked by the tools that are using it -- having some easily callable utility functions that check a manifest to see if it's reasonably configured (possibly emitting warnings) would be useful.

Describe the solution you'd like

To solve this we should:

• Add and expose some WADM manifest semantic checking functionality to wadm
• Expose manifest semantic checking functionality in wash and other tools that may benefit from it (might make sense to issue warnings based on validation output)

Note that some structures may belong in core rather than wadm so they can be more easily accessible.

Describe alternatives you've considered

N/A

Additional context

No response

[vados-cosmonic]

This is done! wash app validate was merged and will be released in the next version of wash