chore(toolkit-lib): fix code registry is disconnected from usage

[mrgrain]

Previously the declared level and payload interfaces were only loosely coupled to actual messages being created. This caused a number of issues with incorrectly documented levels and payload interfaces.

Instead of the previous approach, the code registry is now providing a strongly typed "message builder" function specific to every registered code. This function uses generics, so it can correctly ensure at build time that payloads are as expected.

This is the first PR of this series to keep the diff small. Next steps will be to make the code registry available to the CLI package and to remove the old helpers for creating messages.

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[mrgrain]

this wasn't used and only existed to satisfy the interface

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.00%. Comparing base (01acccf) to head (04b1f8b).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #191      +/-   ##
==========================================
+ Coverage   84.95%   85.00%   +0.04%     
==========================================
  Files         207      207              
  Lines       35723    35723              
  Branches     4612     4601      -11     
==========================================
+ Hits        30348    30365      +17     
+ Misses       5220     5207      -13     
+ Partials      155      151       -4     

Flag	Coverage Δ
suite.unit	85.00% <ø> (+0.04%)	⬆️

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[iliapolo]

Dequeued to address minor comments.

[iliapolo]

Seems like we already have this function here:

aws-cdk-cli/packages/@aws-cdk/toolkit-lib/lib/api/io/private/logger.ts

Line 14 in 01acccf

export function withAction(ioHost: IIoHost, action: ToolkitAction) {

Can we reuse?

[iliapolo]

Unrelated to this PR but it just caught my so putting it out here. This list is slightly different than then one in the CLI. Intentional?

aws-cdk-cli/packages/aws-cdk/lib/toolkit/cli-io-host.ts

Lines 91 to 110 in 01acccf

	export type ToolkitAction =
	| 'assembly'
	| 'bootstrap'
	| 'synth'
	| 'list'
	| 'diff'
	| 'deploy'
	| 'rollback'
	| 'watch'
	| 'destroy'
	| 'context'
	| 'docs'
	| 'doctor'
	| 'gc'
	| 'import'
	| 'metadata'
	| 'notices'
	| 'init'
	| 'migrate'
	| 'version';

[mrgrain]

Yes, the CLI has more. To be unified soon.