Move `Manage storage deals` to kb:

[rjan90]

User Story:

• As a Storage Provider (SP) or Developer, I need the Lotus documentation to be updated to reflect that the Legacy Lotus-Miner Markets sub-system is End-Of-Life (EOL) and being deprecated, so that I have a clear understanding of the transition path to Boost/other markets systems and can easily comprehend the active components of the Lotus-Miner codebase.

Acceptance criteria:

• The documentation should adhere to old links, but should have warnings that these docs are outdated and point to the Boost documentation.
• Lotus documentation should clearly indicate that the Legacy Lotus-Miner Markets sub-system is EOL and that users should migrate to Boost.

Tasks

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1. Move the Manage storage deals page to the knowledge-base
2. Keep links intact
3. Add warnings that the page is outdated