add iceberg_avro interface

[zhjwpku]

Add iceberg_avro interface, this closes #17

[zhjwpku]

@wgtmac Sadly I came across a Windows ci build issue, I don't have a Windows PC, it would be great if you could help to resolve this problem. The problem is two folds:

1. Windows 2019 does not have zlib installed, I installed it in a way that I'm not sure if it's the right way for gh actions
2. it has compile error on avro side, I searched the avro ci directory, I did not see any windows build example

The compile error is as below, see [1] for details, [2] says it is probably an optimization error, I could not go further because I don't have a windows PC ;(

D:\a\iceberg-cpp\iceberg-cpp\build\_deps\avro-src\lang\c++\include\avro\NodeImpl.hh(280): fatal error C1001: Internal compiler error. [D:\a\iceberg-cpp\iceberg-cpp\build\_deps\avro-build\avrocpp_s.vcxproj]
  (compiler file 'D:\a\_work\1\s\src\vctools\Compiler\Utc\src\p2\main.c', line 213)
   To work around this problem, try simplifying or changing the program near the locations listed above.

[1] https://github.com/zhjwpku/iceberg-cpp/actions/runs/12842821805/job/35814127788
[2] https://learn.microsoft.com/en-us/cpp/error-messages/compiler-errors-1/fatal-error-c1001?view=msvc-170

[wgtmac]

Thanks @zhjwpku for working on this! I will have a try early next week.

Update:

1. I managed to build ZLIB from source and install it to /tmp/zlib on Windows.
2. Built Avro successfully by running cmake .. -DCMAKE_PREFIX_PATH=/tmp/zlib -DAVRO_BUILD_EXECUTABLES=OFF -DAVRO_BUILD_TESTS=OFF
3. Built Iceberg successfully by running cmake .. -DCMAKE_PREFIX_PATH=/tmp/zlib.

[wgtmac]

I have created a PR against your repo: zhjwpku#3. The CIs are all green on my side: wgtmac#2. Please take a look and merge if it makes sense. @zhjwpku

[zhjwpku]

I have created a PR against your repo: zhjwpku#3. The CIs are all green on my side: wgtmac#2. Please take a look and merge if it makes sense. @zhjwpku

Appreciate for your impressive work, I'll merge it soon.

[wgtmac]

+1 (Disclaimer: I have pushed some changes to make the CI happy)

Thanks @zhjwpku for taking this work!

This is ready for review @raulcd @lidavidm @gaborkaszab

[wgtmac]

I think this is ready to merge @Xuanwo @Fokko