Fix type hints

[Mulugruntz]

This fixes some type hint issues that are preventing downstream projects from passing CI.

This contains the following changes:

• SizeLimitedFile uses common conventions, types and defaults.
• _fileobj_name -> _obj_name, as it's not related to files.
• rohmufile.write_file only requires HasRead for the input file.
• HasRead, HasWrite use Python conventions, types and defaults.
• FileLike uses Python conventions, types and defaults.
• New HasName.

Why this way

[codecov-commenter]

Codecov Report

Merging #150 (0931939) into main (a37601a) will increase coverage by 0.01%.
The diff coverage is 65.11%.

@@            Coverage Diff             @@
##             main     #150      +/-   ##
==========================================
+ Coverage   66.76%   66.77%   +0.01%     
==========================================
  Files          35       35              
  Lines        3899     3904       +5     
==========================================
+ Hits         2603     2607       +4     
- Misses       1296     1297       +1     

Files	Coverage Δ
rohmu/encryptor.py	81.45% <100.00%> (ø)
rohmu/factory.py	92.85% <100.00%> (ø)
rohmu/filewrap.py	83.33% <100.00%> (ø)
rohmu/snappyfile.py	82.75% <100.00%> (ø)
rohmu/util.py	74.07% <100.00%> (ø)
rohmu/zstdfile.py	29.50% <100.00%> (ø)
rohmu/atomic_opener.py	90.00% <0.00%> (ø)
rohmu/object_storage/s3.py	65.15% <0.00%> (ø)
rohmu/object_storage/sftp.py	47.22% <0.00%> (ø)
rohmu/rohmufile.py	36.28% <75.00%> (ø)
... and 4 more

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[fingon]

If these whitespace changes are required by other projects, there should be autoformat step to ensure future rohmu changes also fullfill these requirements. (And ideally also provides autofixed formatting if available.)

[Mulugruntz]

If these whitespace changes are required by other projects, there should be autoformat step to ensure future rohmu changes also fullfill these requirements. (And ideally also provides autofixed formatting if available.)

You're right, an autoformat would be great.

They are not required for the current problem this PR is fixing. If you like I can drop this particular commit that removes the spaces.

To be noted that the standard is without the space and that many tools will show a lot of alerts when that space is there.
https://mypy.readthedocs.io/en/stable/common_issues.html#spurious-errors-and-locally-silencing-the-checker

You can use the form # type: ignore[<code>] to only ignore specific errors on the line.

Please see my comment, and tell me if you wish me to remove this "ignore" commit.

[fingon]

It is fine to include it too. I don't mind the change, I just want to avoid hidden dependencies on stricter validation in other projects.