Add a temporary standalone action listener middleware incubator package

[markerikson]

This PR:

• Sets up the scaffolding for a standalone package containing the "action listener middleware" from yet another attempt at actionListenerMiddleware #547
• Adds the listener middleware source
• Adds a README with some docs
• Updates TS in the repo from 4.2 to 4.4 because why not

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Sandbox	Source
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Vanilla Typescript	Configuration
rsk-github-issues-example	Configuration

[github-actions]

size-limit report 📦

Path	Size
1. entry point: @reduxjs/toolkit (cjs.production.min.js)	12.23 KB (0%)
1. entry point: @reduxjs/toolkit (esm.js)	10.22 KB (0%)
1. entry point: @reduxjs/toolkit/query (cjs.production.min.js)	20.34 KB (0%)
1. entry point: @reduxjs/toolkit/query (esm.js)	17.37 KB (0%)
1. entry point: @reduxjs/toolkit/query/react (cjs.production.min.js)	22.21 KB (0%)
1. entry point: @reduxjs/toolkit/query/react (esm.js)	19.82 KB (0%)
2. entry point: @reduxjs/toolkit (without dependencies) (cjs.production.min.js)	5.55 KB (0%)
2. entry point: @reduxjs/toolkit (without dependencies) (esm.js)	5.53 KB (0%)
2. entry point: @reduxjs/toolkit/query (without dependencies) (cjs.production.min.js)	9.2 KB (0%)
2. entry point: @reduxjs/toolkit/query (without dependencies) (esm.js)	9.58 KB (0%)
2. entry point: @reduxjs/toolkit/query/react (without dependencies) (cjs.production.min.js)	2.37 KB (0%)
2. entry point: @reduxjs/toolkit/query/react (without dependencies) (esm.js)	2.21 KB (0%)
3. createSlice (esm.js)	5.16 KB (0%)
3. createEntityAdapter (esm.js)	5.83 KB (0%)
3. configureStore (esm.js)	5.83 KB (0%)
3. createApi (esm.js)	15.66 KB (0%)
3. createApi (react) (esm.js)	18.05 KB (0%)
3. fetchBaseQuery (esm.js)	10.93 KB (0%)
3. setupListeners (esm.js)	9.8 KB (0%)
3. ApiProvider (esm.js)	16.99 KB (0%)

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[markerikson]

Package content now looks correct, types are being picked up in a sample project: