[FEAT] Create lib_ccxr and libccxr_exports

[elbertronnie]

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This is an attempt to split #1495 into multiple independant PRs.

This is the first PR that sets up the modules structure and their respective cargo toml files. Every upcoming PR for lib_ccxr will be dependant on this.

[ccextractor-bot]

CCExtractor CI platform finished running the test files on linux. Below is a summary of the test results:

Report Name	Tests Passed
Broken	13/13
CEA-708	2/14
DVB	4/7
DVD	3/3
DVR-MS	2/2
General	24/27
Hauppage	3/3
MP4	2/3
NoCC	10/10
Options	63/87
Teletext	21/21
WTV	0/13
XDS	26/34

It seems that not all tests were passed completely. This is an indication that the output of some files is not as expected (but might be according to you).

Your PR breaks these cases:

• ccextractor -autoprogram -out=srt -latin1 85271be4d2..., Last passed: Never
• ccextractor -autoprogram -out=ttxt -latin1 1974a299f0..., Last passed: Never
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• ccextractor -autoprogram -out=smptett -latin1 -ucla e274a73653..., Last passed: Never
• ccextractor -autoprogram -out=ttxt -xds -latin1 -ucla e274a73653..., Last passed: Never
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• ccextractor -svc 1 -out=txt -nobom -noru ea83ff7bcb..., Last passed: Never
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• ccextractor -svc 1 -out=txt -nobom -noru b5d6aad89f..., Last passed: Never
• ccextractor -svc 1[EUC-KR] -out=txt -noru b5d6aad89f..., Last passed: Never
• ccextractor -svc 1 -out=srt da904de35d..., Last passed: Never
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• ccextractor -svc all da904de35d..., Last passed: Never
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• ccextractor -svc 1,2[UTF-8],3[EUC-KR],54 -out=txt da904de35d..., Last passed: Never
• ccextractor -autoprogram -out=srt -latin1 -1 a65d39ccb3..., Last passed: Never
• ccextractor -svc 1 c83f765c66..., Last passed: Never
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• ccextractor --capfile /repository/Dictionary/MattS_dictionary.txt c83f765c66..., Last passed: Never
• ccextractor -nobi c83f765c66..., Last passed: Never
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• ccextractor --hauppauge d6df1b227a..., Last passed: Never
• ccextractor -tverbose 4e56e88ba4..., Last passed: Never
• ccextractor -teletext 4e56e88ba4..., Last passed: Never
• ccextractor -autoprogram -out=srt -bom -latin1 8849331dda..., Last passed: Never
• ccextractor -stdout -quiet -nofc 79a51f3500..., Last passed: Never
• ccextractor -stdout -quiet -nofc 767b546f96..., Last passed: Never

Check the result page for more info.

[elbertronnie]

@cfsmp3 @PunitLodha Are the tests conducted in the sample platform flaky? Because both this PR and #1555 only add some extra rust code and don't export anything for C. Both the PR shouldn't practically change anything and all the tests should execute in the same way. Still the test results differ. How is this possible?

[cfsmp3]

Ask in slack about the test platform 😁

And please do follow the conversation there about it