feat(mobile): get content in markdown api

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[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 3 lines in your changes missing coverage. Please review.

Project coverage is 70.29%. Comparing base (585fd22) to head (b28b555). Report is 3 commits behind head on lakr/affine-intelligent.

Files with missing lines	Patch %	Lines
...ommon/infra/src/modules/workspace/services/repo.ts	0.00%	2 Missing :warning:
...infra/src/modules/workspace/services/workspaces.ts	0.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## lakr/affine-intelligent #8864 +/- ## =========================================================== - Coverage 70.30% 70.29% -0.01% =========================================================== Files 550 550 Lines 33980 33983 +3 Branches 3052 3053 +1 =========================================================== Hits 23889 23889 - Misses 9719 9722 +3 Partials 372 372 ``` | [Flag](https://app.codecov.io/gh/toeverything/AFFiNE/pull/8864/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=toeverything) | Coverage Δ | | |---|---|---| | [server-test](https://app.codecov.io/gh/toeverything/AFFiNE/pull/8864/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=toeverything) | `77.21% <ø> (ø)` | | | [unittest](https://app.codecov.io/gh/toeverything/AFFiNE/pull/8864/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=toeverything) | `46.06% <0.00%> (-0.02%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=toeverything#carryforward-flags-in-the-pull-request-comment) to find out more.

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