…` moved to tmp-toolkit-helpers (#278)

moves two functions that are relevant to diff into
`tmp-toolkit-helpers`. this will facilitate the adoption of `diff` in
the programmatic toolkit as it will now be able to reuse these
functions.

existing tests pass to ensure no breakage. additional tests have been
added to `tmp-toolkit-helpers` to test `formatXxxDiff`, which were
previously not directly tested.

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Refactors the `cxapp` api code to use modern messaging. This had a
larger amount of knock-on effects then other refactors, to the PR is a
bit bigger.

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the point of this PR is to refactor `formatStackDiff` and
`formatSecurityDiff` into the same class. there's more to do to simplify
these functions, but i'm making small refactors a priority.

the achievement of this PR is to get rid of the giant laundry list of
properties that go into each function in favor of a property bag, and to
store the repeated properties within a class.

this is tested by current unit tests -- as long as they still pass, this
refactor should have not changed any functionality.

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introduces diff support for programmatic toolkit.

- has feature parity with the existing CLI diff
- programmatic toolkit functionality is unit tested.
- AI disclosure: no AI

does most of aws/aws-cdk#33182, but typed
return will come later

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Fixes #296 

This change is to fix URLs that return 404 errors.

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…g does not find a specific count of resources (#251)

Fixes #257

As described in the issue, `CcApiContextProviderPlugin` should have the
way to ensure the result has exact one resource.

This PR adds the `expectedMatchCount` option to restrict the length of
results in `listResources()`.

Unit tests are added and modified ensure the changes.

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Co-authored-by: Rico Huijbers <[email protected]>

Upgrades project dependencies. See details in [workflow run].

[Workflow Run]:
https://github.com/aws/aws-cdk-cli/actions/runs/14161479157

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*Automatically created by projen via the "upgrade" workflow*

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Co-authored-by: Eli Polonsky <[email protected]>

)

Toolkit classes reference the public static `Symbol.asyncDispose`
symbol, but that is only defined on runtimes that are implementing the
new Disposable API yet.

On platforms that don't know that API, that constant doesn't exist and
the class definition fails.

Polyfill it.

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Fixes #302 

In #264, we capture the output of
the Formatter into a stream, and that is then converted to a string.
This diff only gets printed if the diff isn't empty, but by some quirk
`formatStackDiff` used to print the stack name _outside_ of the stream,
thus creating the (correct) behavior. #264 made sure that `format`
doesn't print, so we need to make sure that the consumer of
`formatStackDiff` prints the relevant info.

This PR makes sure that the stack name is returned as the formatted diff
even if the actual diff is empty. We will print the right information
when we print the formatted diff now.

I also made similar modifications to `formatSecurityDiff`, as we should
move away from `format` methods printing anything at all.

BEFORE (cdk 2.1006.0):

<img width="326" alt="Screenshot 2025-04-02 at 9 04 04 AM"
src="https://github.com/user-attachments/assets/03b92517-e475-4c27-a4c1-52217be824c8"
/>


AFTER (my local cdk):

<img width="322" alt="Screenshot 2025-04-02 at 9 03 11 AM"
src="https://github.com/user-attachments/assets/53a7d3e0-2e62-45ca-898b-93c923028346"
/>


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