[FEA] Add support for reading .lp files

[aliceb-nv]

LP problems are often provided in .lp format, which is not currently supported by cuOpt.
File format reference: https://www.fico.com/fico-xpress-optimization/docs/dms2021-01/solver/optimizer/HTML/chapter10_sec_section102.html

[chris-maes]

Moving this to 26.02 release.

[github-actions]

🔔 Hi @anandhkb @aliceb-nv, this issue has had no activity for 21 days. Please update or let us know if it can be closed. Thank you!

If this is an "epic" issue, then please add the "epic" label to this issue.
If it is a PR and not ready for review, then please convert this to draft.
If you just want to switch off this notification, then use the "skip inactivity reminder" label.

[github-actions]

🔔 Hi @anandhkb @aliceb-nv, this issue has had no activity for 21 days. Please update or let us know if it can be closed. Thank you!

If this is an "epic" issue, then please add the "epic" label to this issue.
If it is a PR and not ready for review, then please convert this to draft.
If you just want to switch off this notification, then use the "skip inactivity reminder" label.

[github-actions]

🔔 Hi @anandhkb @aliceb-nv, this issue has had no activity for 21 days. Please update or let us know if it can be closed. Thank you!

If this is an "epic" issue, then please add the "epic" label to this issue.
If it is a PR and not ready for review, then please convert this to draft.
If you just want to switch off this notification, then use the "skip inactivity reminder" label.

[anandhkb]

@aliceb-nv To advise if this is already supported, if NOT, what is the priority

[anandhkb]

@bbozkaya for viz

[bbozkaya]

This would in fact be a good feature to add. .LP files are much more readable and makes it easier to understand the model, objective function, constraints, etc.