* adjust re est cost for nestloop semi/anti join

* add threshold for cost base transform

when prepare_container_, file_id_list use seg_array instead of list_array.

we need assign use_seg_array_ true that time

* Update ob_dtl_rpc_channel.cpp

* Update ob_time_convert.cpp

* Update ob_time_convert.h

* Update ob_expr_date_add.cpp

* fix log spell error:faild -> failled, Faild -> Failed

* Update ob_optimizer_util.cpp

* Update ob_sql.cpp

* Update ob_optimizer_util.cpp

* Update ob_plan_cache_manager.cpp

* Update ob_partition_merge_task.cpp

* Making the root service log consistent

* update log message

* fix typo

* making the log message consistent
Co-authored-by: NEthanDBer <13810907+EthanDBer@users.noreply.github.com>

fix comment typo

* fix error spell

* Change words to lowercase

`build.sh` uses bash-specific array creation syntax, which may not
work with `/bin/sh`. Change it to `bash` to avoid confusion:

Update .clang-format

correct the problem that 'private' and 'public' indentation problem.

docs: Fix typo of url in CONTRIBUTING.md

add pr and issue template

docs: markdown level format README.md

tweak docs, use code instead of quote, note that u r not using POSIX sh syntax

docs: fix typo in README-CN.md

Fix a grammar problem in README.md

docs: Fix spell issue in CONTRIBUTING.md

update README.md, README-CN.md and CONTRIBUTING.md

Co-authored-by: NYilong Li <liyilongko@gmail.com>