[Project] Schema extensions

[ewels]

Meta-task to track collection of issues which are all related to extending the spec for the Nextflow schema - primarily parameters, but should be taken into consideration for sample sheet schema as well, as we build out that stack.

Covered by schema-builder 1.0.0 order by implementation urgency

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1. _ Update schema builder to use JSON draft 2020-12 #2784
2. Rewrite schema build page #2463
   schema +1
   
3. Lint pipeline schema with meta-schema #2654
   linting +1
4. Schema: Write future reference schema #2748
   schema +1
5. Schema: Support nested parameters (objects) #1554
   schema +1
6. Schema: Support arrays #3392
   schema +1
7. Schema: Support anyOf, allOf and oneOf #2427
   schema +1
8. Schema: Conditional show / hide of parameters #3320
   schema +1
9. Depreciate & remove mimetype #2527
   schema +1
10. Schema: Support additional format types #2457
    schema +1
11. Rewrite pipeline launch page website#2015
    enhancement +1
    

Covered in a later release of schema-builder

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1. Schema: Support conditional subschemas #2428
   schema +1
2. Schema: Conditional input file validation #2453
   schema +1
3. Schema: Support multi-line text inputs #3145
   schema +1