Fix documentation

[hexoul]

Motivation

• Wrong formatting.
  • 
  • 
• Missing modules in Sphinx. e.g. centraldogma.watcher, centraldogma.data.entry and so on.

Modifications

• Fix indentations in README.
• Order packages properly in Sphinx.
  • dogma => project_service => repository_service => content_service => watcher.
• Add missing modules in Sphinx.
• Remove unnecessary modules in Sphinx. e.g. centraldogma.base_client, centraldogma.data.constants.
• Fix copyright and authors in Sphinx.

Result

• You can compare with https://line.github.io/centraldogma-python/.
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  • 

[codecov-commenter]

Codecov Report

Base: 93.59% // Head: 93.59% // No change to project coverage :thumbsup:

Coverage data is based on head (1648bc5) compared to base (77423be). Patch has no changes to coverable lines.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #41 +/- ## ======================================= Coverage 93.59% 93.59% ======================================= Files 23 23 Lines 703 703 ======================================= Hits 658 658 Misses 45 45 ``` | [Impacted Files](https://codecov.io/gh/line/centraldogma-python/pull/41?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=line) | Coverage Δ | | |---|---|---| | [centraldogma/dogma.py](https://codecov.io/gh/line/centraldogma-python/pull/41/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=line#diff-Y2VudHJhbGRvZ21hL2RvZ21hLnB5) | `100.00% <ø> (ø)` | | | [centraldogma/watcher.py](https://codecov.io/gh/line/centraldogma-python/pull/41/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=line#diff-Y2VudHJhbGRvZ21hL3dhdGNoZXIucHk=) | `75.00% <ø> (ø)` | | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=line). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=line)

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[minwoox]

Oops, thanks, @hexoul!