runtime(thrift): add ftplugin, indent and syntax scripts

Problem: Apache Thrift files misses ftplugin, indent and syntax scripts

Solution:
- add ftplugin and indent scripts
- add thrift indent test
- port the syntax script from apache/thrift (Apache License 2)

Reference:
https://diwakergupta.github.io/thrift-missing-guide/#_language_reference

closes: #15387

Signed-off-by: Yinzuo Jiang <jiangyinzuo@foxmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

runtime/ftplugin/thrift.vim

@@ -0,0 +1,17 @@
+" Vim filetype plugin file
+" Language: Apache Thrift
+" Maintainer: Yinzuo Jiang <jiangyinzuo@foxmail.com>
+" Last Change: 2024/07/29
+
+if exists("b:did_ftplugin")
+  finish
+endif
+
+let b:did_ftplugin = 1
+
+" Thrift supports shell-style, C-style multi-line as well as single-line Java/C++ style comments.
+" Reference: https://diwakergupta.github.io/thrift-missing-guide/#_language_reference
+setlocal comments=sO:*\ -,mO:*\ \ ,exO:*/,s1:/*,mb:*,ex:*/,:///,://,b:#
+setlocal commentstring=//\ %s
+
+let b:undo_ftplugin = 'setl comments< commentstring<'