docs: add migration doc for metadata manager provider APIs (#1049) #1062

Job	Run time
Lint / Code	19s
Build / Build libraries	37s
Lint / GitHub Actions	6s
Build / TypeScript compilation	19s
Lint / Commit messages	17s
Style / Format check	15s
Test / Unit tests (libs)	43s
Test / Unit tests (schematics)	27s
API Extractor / API Extractor	18s
Example apps / Load CI/CD configuration	2s
Example apps / Example app - Angular v15 - Coverage enabled	1m 19s
Example apps / Example app - Angular v15 - Coverage disabled	1m 16s
Example apps / Example app - Angular v16 - Coverage enabled	1m 32s
Example apps / Example app - Angular v16 - Coverage disabled	1m 13s
Example apps / Example app - Angular v17 - Coverage enabled	49s
Example apps / Example app - Angular v17 - Coverage disabled	48s
Example apps / Example app - Angular v18 - Coverage enabled	45s
Example apps / Example app - Angular v18 - Coverage disabled	38s
E2E / Load CI/CD configuration	3s
Bundle size / Load CI/CD configuration	5s
E2E / E2E tests - Angular v15	58s
E2E / E2E tests - Angular v16	49s
E2E / E2E tests - Angular v17	1m 17s
E2E / E2E tests - Angular v18	1m 8s
Bundle size / Analysis - Angular v15	16s
Bundle size / Analysis - Angular v16	19s
Bundle size / Analysis - Angular v17	18s
Bundle size / Analysis - Angular v18	18s
Bundle size / Store - Angular v15	3s
Bundle size / Store - Angular v16	5s
Bundle size / Store - Angular v17	6s
Bundle size / Store - Angular v18	3s
Docs / Docs build & deploy	56s
Coverage / Upload to Codecov	19s
Release / Semantic Release	58s
	19m 44s

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