* Added doctypes related to shares
- Shareholder doctype, the entity who does the transaction
- Share doctype, a child table to kepp list of all shares
- Share Transfer doctype, Logs of all made transactions
* Added logic for share transfer
- update shareholder automatically on share transfer/issue/purchase
- purchase and transfer have method remove_share which doesn't get executed because of some bug
* Added report view for share ledger
* Removed share number tracking
- removed share number tracking from Share Ledger child table for Shareholder doctype
- new doctype Share Type created
* Share Balance report added
- math behind Share Balance report needs fixing
* Changes in shareholder
- Share numbers are not tracked in Shareholder
- Share Ledger doctype deleted
- Share Balance Report bug fixed
* Shareholder
- fixed report for share balance
- remove bug from share transfer by making share type mandatory
- added buttons to shareholder for direct link to report
* Added tests for Share Transfer
* minor codacy fixes
* Added Shareholder to Party Type
* rate in share ledger & balance report is currency
* First attempt at modelling shares after Item
* Share Manager changes
- on creation of shareholder party it should check if the same combo exists
- in shareholder party make report button visible iff folio no exists
- create folio no on creation of share transfer iff it doesnt already exist
- move reports from shareholder to shareholder party
* Shareholder chages
- delete share child table doctype
- autoname added to folio no
- modify tests for share transfer
* minor changes
* removed share_no child doctype
* Restructured Share Transfer Logic (not tested)
- Everything revolves around Share Balance child table in Shareholder Party
- is_company flag still to be utilized
* Tested Share Tranfer
* minor fixes
* started new shareholder structure
* modified shareholder
* renamed Shareholder Party to Shareholder
* Shareholder rewrite complete
* new tests for shareholder written
* codacy fixes
* Added documentation
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