fix(plugins): Display required Spin version of incompatible plugins

[kate-goldenring]

fixes #1562

Currently listing plugins doesn't say what version of spin is requred:

$ spin plugins list
cloud 0.1.0 [requires other Spin version]
js2wasm 0.1.0
js2wasm 0.2.0
js2wasm 0.3.0 [requires other Spin version]
js2wasm 0.4.0
py2wasm 0.1.0
py2wasm 0.1.1
py2wasm 0.2.0 [installed]

This makes the list more informative:

$ spin plugins list
cloud 0.1.0 [requires Spin >=1.3]
js2wasm 0.1.0
js2wasm 0.2.0
js2wasm 0.3.0 [requires Spin <=0.7]
js2wasm 0.4.0
py2wasm 0.1.0
py2wasm 0.1.1
py2wasm 0.2.0 [installed]

Note: i messed with js2wasm manifest to make it incompat for demo purposes

Considerations

• the plugin manifests allow for fairly complicated semver. We could run into this getting messy but it is unlikely

[itowlson]

LGTM and output looks great - thanks!

[itowlson]

super duper nit: line break before