feat: add wiki guide for API Catalog

[wenytang-ms]

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 80.00000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 46.07%. Comparing base (1721269) to head (283cda1). Report is 1 commits behind head on dev.

Files with missing lines	Patch %	Lines
src/extension.ts	0.00%	3 Missing :warning:

Additional details and impacted files

[](https://app.codecov.io/gh/microsoft/vscode-azureapicenter/pull/272?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=microsoft) ```diff @@ Coverage Diff @@ ## dev #272 +/- ## ========================================== + Coverage 45.96% 46.07% +0.11% ========================================== Files 92 92 Lines 5826 5840 +14 Branches 141 142 +1 ========================================== + Hits 2678 2691 +13 - Misses 3146 3147 +1 Partials 2 2 ``` | [Files with missing lines](https://app.codecov.io/gh/microsoft/vscode-azureapicenter/pull/272?dropdown=coverage&src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=microsoft) | Coverage Δ | | |---|---|---| | [src/constants.ts](https://app.codecov.io/gh/microsoft/vscode-azureapicenter/pull/272?src=pr&el=tree&filepath=src%2Fconstants.ts&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=microsoft#diff-c3JjL2NvbnN0YW50cy50cw==) | `100.00% <100.00%> (ø)` | | | [src/tree/DataPlaneAccount.ts](https://app.codecov.io/gh/microsoft/vscode-azureapicenter/pull/272?src=pr&el=tree&filepath=src%2Ftree%2FDataPlaneAccount.ts&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=microsoft#diff-c3JjL3RyZWUvRGF0YVBsYW5lQWNjb3VudC50cw==) | `67.93% <100.00%> (+3.47%)` | :arrow_up: | | [src/uiStrings.ts](https://app.codecov.io/gh/microsoft/vscode-azureapicenter/pull/272?src=pr&el=tree&filepath=src%2FuiStrings.ts&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=microsoft#diff-c3JjL3VpU3RyaW5ncy50cw==) | `100.00% <100.00%> (ø)` | | | [src/extension.ts](https://app.codecov.io/gh/microsoft/vscode-azureapicenter/pull/272?src=pr&el=tree&filepath=src%2Fextension.ts&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=microsoft#diff-c3JjL2V4dGVuc2lvbi50cw==) | `0.00% <0.00%> (ø)` | |

[wenytang-ms]

Shall we consider also adding a 'learnApiCatalog' item in Tree View when it is empty in Tree View? @formulahendry please help review again