Add warmstart, model update, update docs

[Iroy30]

Description

Added:

• updateConstraint() - Updates constraint coefficients and rhs
• updateObjective() - Updates objective coefficients, constant and sense
• get_pdlp_warm_start() - Retrieves warmstart data
• relax() - to convert MIP to LP
• getVariable and getConstraint to get vars and constrs by name or index
• Updated docs and added tests
• Fixed Objective expression bug when adding duplicate variables

Issue

Checklist

• I am familiar with the Contributing Guidelines.
• Testing
  • New or existing tests cover these changes
  • Added tests
  • Created an issue to follow-up
  • NA
• Documentation
  • The documentation is up to date with these changes
  • Added new documentation
  • NA

[copy-pr-bot]

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[rgsl888prabhu]

/ok to test

[copy-pr-bot]

/ok to test

@rgsl888prabhu, there was an error processing your request: E1

See the following link for more information: https://docs.gha-runners.nvidia.com/cpr/e/1/

[rgsl888prabhu]

/ok to test 763ad06

[rgsl888prabhu]

Thank you @Iroy30 for adding missing functions, please also add an example under example.rst on how to use warm start

[Iroy30]

/ok to test 744600d

[Iroy30]

/ok to test b807173

[Iroy30]

/ok to test a26cfd4

[Iroy30]

/ok to test ddd2fcd

[rgsl888prabhu]

Minor change, rest looks good. Awesome work @Iroy30.

[anandhkb]

/ok to test

[copy-pr-bot]

/ok to test

@anandhkb, there was an error processing your request: E1

See the following link for more information: https://docs.gha-runners.nvidia.com/cpr/e/1/

[Iroy30]

/ok to test 8e1953d

[Iroy30]

/merge