createAsyncThunk: support for meta

[phryneas]

Gotta add docs & more type tests for different scenarios on this one, but this would essentially be it.

This should close #750, #924, #1044

@markerikson can you take a look if this covers all your thoughts?

[phryneas]

Damn, that failed fast 😅

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Latest deployment of this branch, based on commit 5500116:

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

[github-actions]

Size Change: +1 kB (0%)

Total Size: 531 kB

Filename	Size	Change
dist/query/react/rtk-query-react.umd.js	187 kB	+91 B (0%)
dist/query/react/rtk-query-react.umd.min.js	62.8 kB	+59 B (0%)
dist/query/rtk-query.umd.js	27.1 kB	+81 B (0%)
dist/query/rtk-query.umd.min.js	16.1 kB	+63 B (0%)
dist/redux-toolkit.cjs.development.js	12.1 kB	+101 B (+1%)
dist/redux-toolkit.cjs.production.min.js	5.87 kB	+68 B (+1%)
dist/redux-toolkit.esm.js	11.7 kB	+110 B (+1%)
dist/redux-toolkit.modern.development.js	9.6 kB	+97 B (+1%)
dist/redux-toolkit.modern.js	9.63 kB	+96 B (+1%)
dist/redux-toolkit.modern.production.min.js	4.58 kB	+70 B (+2%)
dist/redux-toolkit.umd.js	22 kB	+102 B (0%)
dist/redux-toolkit.umd.min.js	10.8 kB	+64 B (+1%)

ℹ️ View Unchanged

Filename	Size	Change
dist/index.js	146 B	0 B
dist/query/index.js	144 B	0 B
dist/query/react/index.js	149 B	0 B
dist/query/react/rtk-query-react.cjs.development.js	17.3 kB	0 B
dist/query/react/rtk-query-react.cjs.production.min.js	11.1 kB	0 B
dist/query/react/rtk-query-react.esm.js	16.9 kB	0 B
dist/query/react/rtk-query-react.modern.development.js	13.9 kB	0 B
dist/query/react/rtk-query-react.modern.js	14 kB	0 B
dist/query/react/rtk-query-react.modern.production.min.js	9.25 kB	0 B
dist/query/rtk-query.cjs.development.js	14.5 kB	0 B
dist/query/rtk-query.cjs.production.min.js	9.34 kB	0 B
dist/query/rtk-query.esm.js	14.2 kB	0 B
dist/query/rtk-query.modern.development.js	11.6 kB	0 B
dist/query/rtk-query.modern.js	11.7 kB	0 B
dist/query/rtk-query.modern.production.min.js	7.69 kB	0 B

_{compressed-size-action}

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[github-actions]

size-limit report 📦

Path	Size
1. entry point: @reduxjs/toolkit (cjs.production.min.js)	12.16 KB (+0.46% 🔺)
1. entry point: @reduxjs/toolkit (esm.js)	10.19 KB (+0.68% 🔺)
1. entry point: @reduxjs/toolkit/query (cjs.production.min.js)	20.06 KB (+0.3% 🔺)
1. entry point: @reduxjs/toolkit/query (esm.js)	17.08 KB (+0.31% 🔺)
1. entry point: @reduxjs/toolkit/query/react (cjs.production.min.js)	21.83 KB (+0.28% 🔺)
1. entry point: @reduxjs/toolkit/query/react (esm.js)	19.42 KB (+0.3% 🔺)
2. entry point: @reduxjs/toolkit (without dependencies) (cjs.production.min.js)	5.51 KB (+1.26% 🔺)
2. entry point: @reduxjs/toolkit (without dependencies) (esm.js)	5.48 KB (+1.3% 🔺)
2. entry point: @reduxjs/toolkit/query (without dependencies) (cjs.production.min.js)	8.95 KB (0%)
2. entry point: @reduxjs/toolkit/query (without dependencies) (esm.js)	9.34 KB (0%)
2. entry point: @reduxjs/toolkit/query/react (without dependencies) (cjs.production.min.js)	2.25 KB (0%)
2. entry point: @reduxjs/toolkit/query/react (without dependencies) (esm.js)	2.1 KB (0%)
3. createSlice (esm.js)	5.15 KB (0%)
3. createEntityAdapter (esm.js)	5.19 KB (0%)
3. configureStore (esm.js)	5.2 KB (0%)
3. createApi (esm.js)	15.7 KB (+0.35% 🔺)
3. createApi (react) (esm.js)	17.98 KB (+0.32% 🔺)
3. fetchBaseQuery (esm.js)	10.61 KB (+0.5% 🔺)
3. setupListeners (esm.js)	9.76 KB (+0.57% 🔺)
3. ApiProvider (esm.js)	16.96 KB (+0.33% 🔺)

[phryneas]

Added a bunch of docs for now, we can always add more later.