Adding O_spec feature

[Monikacopilot2]

Added comprehensive O-spec (Output Specification) parsing support to the fixed-form RPG parser in language/models/fixed.js.
Changes Made
New Function: parseOLine()
Implemented a complete parser for fixed-form RPG Output specifications that extracts all standard O-spec fields according to IBM i RPG column positions

[mounigopisetti1162]

I tested the code, and it’s working as expected. I’m able to see the O-specs.

[bobcozzi]

I've added basic O and I spec "Ruler" support to the RPGLE extension. To support O and I better.

[worksofliam]

1. There are not enough test cases for O-spec support. Need a lot more, since there are lots of edge cases.
2. The bigger discussion that is needed is I and O spec support in general. I did start on I support and made good progress, but I never finished it. (Branch feature/i_spec)

[worksofliam]

see comment above

[Monikaibmi15]

Added testcase for O-spec for support.

[worksofliam]

@Monikaibmi15 If you could fix the conflicts, that would be great

[worksofliam]

fix the conflicts and we're good

[supravi96]

@worksofliam This PR had a significant number of merge conflicts, so we’ve created a new PR with all conflicts resolved and the latest updates incorporated to make the review process smoother.

Please refer to the new PR for review #507

[venky225]

https://github.ibm.com/bob-for-ibm-i/vscode-ibmi-bob/issues/243