[WIP] Port to dconfig

[wineee]

Summary by Sourcery

This PR ports the Treeland configuration system to use dconfig. It introduces separate configurations for global and user-specific settings, managed in a dedicated thread. The changes include removing the old DConfig implementation, introducing dconfig-based configuration classes, and updating the code to use the new configuration properties.

[deepin-ci-robot]

Skipping CI for Draft Pull Request.
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[deepin-ci-robot]

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[deepin-bot]

TAG Bot

New tag: 0.5.20
DISTRIBUTION: unstable
Suggest: synchronizing this PR through rebase #409

[deepin-bot]

TAG Bot

New tag: 0.5.21
DISTRIBUTION: unstable
Suggest: synchronizing this PR through rebase #411

[deepin-ci-robot]

@wineee: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
deepin-auto-translation	28033a4	link	true	/test deepin-auto-translation

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[deepin-bot]

TAG Bot

New tag: 0.6.0
DISTRIBUTION: unstable
Suggest: synchronizing this PR through rebase #477

[deepin-bot]

TAG Bot

New tag: 0.6.1
DISTRIBUTION: unstable
Suggest: synchronizing this PR through rebase #482

[deepin-bot]

TAG Bot

New tag: 0.6.2
DISTRIBUTION: unstable
Suggest: synchronizing this PR through rebase #486

[deepin-bot]

TAG Bot

New tag: 0.7.0
DISTRIBUTION: unstable
Suggest: synchronizing this PR through rebase #540

[wineee]

#548