feat: add APIs to support incremental query impl

[xushiyan]

Description

• Add new table API get_file_slices_between() to support reading incremental file slices for engine integration
• Add time range configs for file group reader to support filtering records and log file scanning
  • hoodie.read.file_group.start_timestamp
  • hoodie.read.file_group.end_timestamp
• Remove hoodie.read.as.of.timestamp from configs in favor of passing time travel timestamp via API
• Refactor the table APIs impl to provide clearer flow of reading file slices
  • Push down the logic of checking base file only and composing instant range to file group reader
• Add the corresponding Python APIs

Closes #271

How are the changes test-covered

• N/A
• Automated tests (unit and/or integration tests)
• Manual tests
  • Details are described below

[codecov]

Codecov Report

Attention: Patch coverage is 93.85965% with 7 lines in your changes missing coverage. Please review.

Project coverage is 91.77%. Comparing base (56fa681) to head (ac54374).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/core/src/file_group/reader.rs	93.10%	4 Missing ⚠️
crates/core/src/table/mod.rs	93.18%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #272      +/-   ##
==========================================
+ Coverage   91.02%   91.77%   +0.74%     
==========================================
  Files          41       41              
  Lines        2050     2078      +28     
==========================================
+ Hits         1866     1907      +41     
+ Misses        184      171      -13     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.