Convert BookDataSource.java into kotlin

[MohitMaliFtechiz]

Fixes: #3007 Parent Issue: #1826

Converted BookDataSource.java into kotlin

[codecov[bot]]

Codecov Report

Base: 49.33% // Head: 48.84% // Decreases project coverage by -0.49% :warning:

Coverage data is based on head (a17f943) compared to base (40115f7). Patch coverage: 25.26% of modified lines in pull request are covered.

Additional details and impacted files

@@              Coverage Diff              @@
##             develop    #3008      +/-   ##
=============================================
- Coverage      49.33%   48.84%   -0.50%     
  Complexity        25       25              
=============================================
  Files            299      299              
  Lines           9583     9610      +27     
  Branches        1028     1031       +3     
=============================================
- Hits            4728     4694      -34     
- Misses          4380     4444      +64     
+ Partials         475      472       -3     

Impacted Files	Coverage Δ
...wixmobile/core/data/local/entity/BookDataSource.kt	0.00% <0.00%> (ø)
...g/kiwix/kiwixmobile/core/main/CoreWebViewClient.kt	30.00% <30.00%> (ø)
.../kiwixmobile/core/utils/ZimReaderContainerUtils.kt	0.00% <0.00%> (-50.00%)	:arrow_down:
.../kiwix/kiwixmobile/core/main/TableDrawerAdapter.kt	48.93% <0.00%> (-38.30%)	:arrow_down:
.../org/kiwix/kiwixmobile/core/main/DocumentParser.kt	68.00% <0.00%> (-28.00%)	:arrow_down:
...obile/core/page/history/adapter/HistoryListItem.kt	46.34% <0.00%> (-24.40%)	:arrow_down:
...kiwix/kiwixmobile/core/downloader/model/Seconds.kt	40.90% <0.00%> (-18.19%)	:arrow_down:
...wix/kiwixmobile/core/main/MainRepositoryActions.kt	11.11% <0.00%> (-16.67%)	:arrow_down:
...bile/nav/destination/reader/KiwixReaderFragment.kt	47.94% <0.00%> (-4.11%)	:arrow_down:
...java/org/kiwix/kiwixmobile/core/data/Repository.kt	38.88% <0.00%> (-3.71%)	:arrow_down:
... and 8 more

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[stale[bot]]

This pull request has been automatically marked as stale because it has not had recent activity. It will be now be reviewed manually. Thank you for your contributions.