Add plugin: Exmemo Client

[xieyan0811]

It is a client of ExMemo designed as an Obsidian plugin for synchronization and retrieval.

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• Community Plugin
• Community Theme

[github-actions]

Hello!

I found the following issues in your plugin submission

Errors:

❌ You did not follow the pull request template
❌ The newly added entry is not at the end, or you are submitting on someone else's behalf. The last plugin in the list is: exmemo-ai/obsidian-exmemo-client. If you are submitting from a GitHub org, you need to be a public member of the org.
❌ Please don't use the word obsidian in the plugin ID. The ID is used for your plugin's folder so keeping it short and simple avoids clutter and helps with sorting.
❌ The fundingUrl field in your manifest should not point to the Obsidian Website, If you don't have a link were users can donate to you, you can just remove it from the manifest.
❌ Unable to find a release with the tag 1.0.0. Make sure that the version in your manifest.json file in your repo points to the correct Github Release.

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^{This check was done automatically. Do NOT open a new PR for re-validation. Instead, to trigger this check again, make a change to your PR and wait a few minutes, or close and re-open it.}

[github-actions]

Hello!

I found the following issues in your plugin submission

Errors:

❌ You did not follow the pull request template
❌ Please don't use the word obsidian in the plugin ID. The ID is used for your plugin's folder so keeping it short and simple avoids clutter and helps with sorting.
❌ Plugin ID mismatch, the ID in this PR (obsidian-exmemo-client) is not the same as the one in your repo (exmemo-client). If you just changed your plugin ID, remember to change it in the manifest.json in your repo and your latest GitHub release.
❌ Your latest version number is not valid. Only numbers and dots are allowed.

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^{This check was done automatically. Do NOT open a new PR for re-validation. Instead, to trigger this check again, make a change to your PR and wait a few minutes, or close and re-open it.}