We added basic English usage guide. In addition, I thought some Chinese sentences are not good so I modified them.

TODO: Yamei suggested to split this file into basic usage and architecture. I will do it in next PRs

* add paddle.vision.transforms.* api cn doc

* add alias for paddle.vision.transforms

* delete invalid file

updata norm doc

* add model save load guide

* polish details

* fix index number

* polish hapi & add note

* add_totorial_for_paddle test=develop

* fix_index test=develop

* fix_index_tutorial test=develop

* fix_index test=develop

* fix_index test=develop

* fix_index test=develop

* fix index test=develop

* change_md_to_rst test=develop

* fix image path test=develop

* fix index test=develop

* fix image test=develop

* fix_image test=develop

* fix image test=develop

* change title test=develop

* add new ci_scripts for new paddle doc dirs

* fix path error

* fix path error

* update configs & 2.0 examples

* move apis directory

* update api names

* add new ci_scripts for new paddle doc dirs

* fix path error

* add_faq_index test=develop

* remove layout

* add_guides for paddle test=develop

* add_guides to index test=develop

* fix_guides_index test=develop

* fix_en_docs test=develop

* remove old index test=develop

* refine doc of stack

* update paddle api

* fix typo

* fix doc

* fix sample code

* fix code-block

* add program api & update example

* replace correct jit.save/load

* update program api example

* fix AdamOptimizer, test=develop, test=document_fix

* fix AdamOptimizer, test=develop, test=document_fix

* fix AdamOptimizer, test=develop, test=document_fix

* fix AdamOptimizer, test=develop, test=document_fix

* fix python code

* fix batchnorm ,test=develop

As the title.

* add the chinese doc of binary_cross_entropy_with_logits.

* refind rand, randn, standard_normal, normal, randint, randperm docs

test=develop

* test=develop

* fix AdamOptimizer, test=develop, test=document_fix

* fix AdamOptimizer, test=develop, test=document_fix

* fix AdamOptimizer, test=develop, test=document_fix

* fix AdamOptimizer, test=develop, test=document_fix

* fix python code

* fix norm bug cn doc, test=develop

* fix norm bug cn doc, test=develop

* polish load and saveloadconfig doc

* adjust alias

fix the argmax, argmin doc, change the default value for the argmax/argmin

* for new optimizer

* update en doc

* update en doc

* update en doc

* update cn doc

* fix cn doc

* update doc

* fix code style

* fix firmula of adamw

* update doc

* update doc

* fix sample code

* fix sample code

* fix rmsprop sample code

* change learningratedecay to lrscheduler

* fix doc

* fix return

* fix sample code

* fix sample code

* fix sample code

* fix sample code

* fix index test=develop

* fix some api index test=develop
Co-authored-by: NTC.Long <chenlong@TCLongdeMacBook-Pro.local>