Support cljr platform

[hongheng]

• Supportcljr platform. clj implementation will be treated as default implementation. The cljr branches are only imported when cljr can not compile the default branch. Currently, there are only 3 cljr branches in implementation.
• Successfully run test cases under clj, cljs, and cljr.
• Supports compilation by Magic and runtime compilation by clojure-clr.

[robertluo]

Are there any building steps to test the clojure-clr part?

[codecov-commenter]

Codecov Report

Patch coverage: 64.15% and no project coverage change.

Comparison is base (41977a8) 74.64% compared to head (03ab8f2) 74.64%.

:exclamation: Current head 03ab8f2 differs from pull request most recent head f4e7f13. Consider uploading reports for the commit f4e7f13 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##           master      #58   +/-   ##
=======================================
  Coverage   74.64%   74.64%           
=======================================
  Files           5        5           
  Lines         209      209           
  Branches       14       14           
=======================================
  Hits          156      156           
  Misses         39       39           
  Partials       14       14           

Files Changed	Coverage Δ
src/robertluo/fun_map/helper.cljc	79.54% <ø> (ø)
src/robertluo/fun_map/core.cljc	61.97% <61.22%> (ø)
src/robertluo/fun_map.cljc	91.48% <100.00%> (ø)
src/robertluo/fun_map/wrapper.cljc	72.50% <100.00%> (ø)

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