added schema data source + docs

[azaurus1]

• adds schema data source
• includes docs

[codacy-production[bot]]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
:white_check_mark: -0.76% (target: -1.00%)	:white_check_mark: 58.33%

Coverage variation details

| | Coverable lines | Covered lines | Coverage | | ------------- | ------------- | ------------- | ------------- | | Common ancestor commit (10fa36507275a0170e2bb0c36801d6f06028f4ee) | 1668 | 1104 | 66.19% | | | Head commit (1868405cca6e8b973aa9bacb90936059890a88ff) | 3696 (+2028) | 2418 (+1314) | 65.42% (**-0.76%**) | **Coverage variation** is the difference between the coverage for the head and common ancestor commits of the pull request branch: ` - `

Diff coverage details

| | Coverable lines | Covered lines | Diff coverage | | ------------- | ------------- | ------------- | ------------- | | Pull request (#86) | 180 | 105 | **58.33%** | **Diff coverage** is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: `/ * 100%`

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