feat: Added new API endpoints

[ankitdas13]

Add these endpoints

• Added file upload feature

• Add bank account

• Delete bank account

• fetch a payment (emi/ offer/ card/ upi)

• fetch all settlements with payouts

• fetch instant settlements with id with payout details

• fetch all IINs Supporting native otps

• fetch all IINs with business sub-type

• fetch all dispute

• fetch a dispute

• Accept a dispute

• Contest a dispute

• Create a document

• fetch document informantion

• View rto reasons

• Update fulfilment details

• fetch eligibility

• Eligility api

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 0% with 67 lines in your changes missing coverage. Please review.

Project coverage is 49.45%. Comparing base (4d11a22) to head (99b1972). Report is 7 commits behind head on master.

Files	Patch %	Lines
src/Customer.php	0.00%	12 Missing :warning:
src/Dispute.php	0.00%	12 Missing :warning:
src/Account.php	0.00%	7 Missing :warning:
src/Entity.php	0.00%	7 Missing :warning:
src/Stakeholder.php	0.00%	7 Missing :warning:
src/Order.php	0.00%	6 Missing :warning:
src/Document.php	0.00%	5 Missing :warning:
src/Settlement.php	0.00%	5 Missing :warning:
src/Iin.php	0.00%	3 Missing :warning:
src/Payment.php	0.00%	3 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #366 +/- ## ============================================ - Coverage 53.88% 49.45% -4.43% - Complexity 234 255 +21 ============================================ Files 32 34 +2 Lines 670 734 +64 ============================================ + Hits 361 363 +2 - Misses 309 371 +62 ```

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