Add Chandrayaan 2 OHRC ingestion page and fix the conda install command

[oleg-alexandrov]

Add OHRC ingestion docs and fix the install command

Summary

This adds a new page documenting how to ingest Chandrayaan 2 OHRC images, parallel to the existing TMC-2 page. Previously OHRC ingestion was only linked out to the Ames Stereo Pipeline docs; now it is covered in the Astro docs for both instruments.

• New page getting-started/csm-stack/ingesting-ohrc.md. OHRC uses spiceinit followed by isd_generate -k, which is intentionally different from the TMC-2 isd_generate -s path. A note on the page explains why.
• Fix the conda install command on both the OHRC and TMC-2 pages. ISIS 10 is not released yet, so isis>=10.0.0 does not resolve (release candidates sort before the final release in conda). Pin isis=10.0.0_RC2 from the usgs-astrogeology/label/RC channel, bump ale to 1.1.3, and pin usgscsm=2.0.2. This command was tested on macOS ARM64 and resolves and installs cleanly, with spiceql 1.2.7 pulled in as a dependency.
• Update the stale SPICE kernel note on both pages. Kernels are now distributed through the ISIS data area and fetched with downloadIsisData chandrayaan2, rather than downloaded manually from PRADAN.
• Add both ingestion pages to the site navigation menu, and add cross-links between the OHRC page, the TMC-2 page, and the Chandrayaan 2 mission page.

Licensing

This project is mostly composed of free and unencumbered software released into the public domain, and we are unlikely to accept contributions that are not also released into the public domain. Somewhere near the top of each file should have these words:

This work is free and unencumbered software released into the public domain. In jurisdictions that recognize copyright laws, the author or authors of this software dedicate any and all copyright interest in the software to the public domain.

• I dedicate any and all copyright interest in this software to the public domain. I make this dedication for the benefit of the public at large and to the detriment of my heirs and successors. I intend this dedication to be an overt act of relinquishment in perpetuity of all present and future rights to this software under copyright law.