docs: prepare state store guidance for RocksDB removal - #62

Running Vale across on the following files affected by this PR:

- STYLE_GUIDE.md
- node/giga-storage-migration.mdx
- node/index.mdx
- node/node-operators.mdx
- node/snapshot.mdx
- node/statesync.mdx

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STYLE_GUIDE.md:
	- 1:3       Use sentence case for headings: 'Sei Docs Style Guide'.
	- 9:5       Use sentence case for headings: 'Beginner Friendly'.
	- 25:41     'quite' is often unnecessary qualifying language — consider removing it.
	- 25:57     'completely' is often unnecessary qualifying language — consider removing it.
	- 26:25     'simply' is often unnecessary qualifying language — consider removing it.
	- 67:5      Use sentence case for headings: 'Cosmos-SDK (Deprecated)'.
	- 73:5      Use sentence case for headings: 'Operate (Node)'.
	- 82:4      Use sentence case for headings: 'Style Guidelines'.
	- 84:5      Use sentence case for headings: 'Acronyms and Abbreviations'.
	- 90:177    'very' is often unnecessary qualifying language — consider removing it.
	- 255:5     Use sentence case for headings: 'Callouts and Admonitions'.

node/giga-storage-migration.mdx:
	- 55:4     Use sentence case for headings: 'Migration Steps'.
	- 57:5     Use sentence case for headings: 'Step 1: Update ********'.
	- 197:4    Use sentence case for headings: 'FAQ'.
	- 206:5    Use sentence case for headings: 'Does Giga SS Store change the app hash or consensus?'.
	- 233:5    Use sentence case for headings: 'Does Giga SS Store support historical proofs?'.

node/index.mdx:
	- 22:4     Use sentence case for headings: 'Network Versions'.
	- 28:4     Use sentence case for headings: 'Hardware Requirements'.
	- 37:4     Use sentence case for headings: 'Installation & Setup Steps'.
	- 50:8     Use sentence case for headings: '2. Install Essential Packages'.
	- 56:8     Use sentence case for headings: '3. Synchronize System Time'.
	- 64:7     Use sentence case for headings: 'Install Go'.
	- 74:8     Use sentence case for headings: 'Installation Steps'.
	- 199:7    Use sentence case for headings: 'Initialize Chain Files'.
	- 227:7    Use sentence case for headings: 'Configure App Settings'.
	- 257:6    Use sentence case for headings: 'Archive Node Setup'.
	- 271:6    Use sentence case for headings: 'Mempool Configuration'.
	- 359:7    Use sentence case for headings: 'Monitoring & Troubleshooting'.
	- 395:4    Use sentence case for headings: 'Node Resources'.
	- 397:5    Use sentence case for headings: 'Node Setup'.
	- 411:5    Use sentence case for headings: 'Advanced Operations'.

node/node-operators.mdx:
	- 12:4      Use sentence case for headings: 'Configuration Management'.
	- 14:5      Use sentence case for headings: 'Directory Structure'.
	- 34:5      Use sentence case for headings: 'Essential Configuration Parameters'.
	- 36:6      Use sentence case for headings: 'Network Settings (config.toml)'.
	- 62:6      Use sentence case for headings: 'Application Settings (app.toml)'.
	- 102:5     Use sentence case for headings: 'Default Configurations'.
	- 1356:4    Use sentence case for headings: 'Database Management'.
	- 1384:5    Use sentence case for headings: 'SeiDB Configuration'.
	- 1454:6    Use sentence case for headings: 'PebbleDB version encoding'.
	- 1473:5    Use sentence case for headings: 'Giga Storage and Giga Executor'.
	- 1517:5    Use sentence case for headings: 'Database Maintenance'.
	- 1544:4    Use sentence case for headings: 'Service Management'.
	- 1546:5    Use sentence case for headings: 'Systemd Commands'.
	- 1565:5    Use sentence case for headings: 'Log Management'.
	- 1586:4    Use sentence case for headings: 'Update Procedures'.
	- 1596:5    Use sentence case for headings: 'Minor Updates'.
	- 1638:5    Use sentence case for headings: 'Major Updates'.
	- 1682:4    Use sentence case for headings: 'Performance Optimization'.
	- 1690:5    Use sentence case for headings: 'Memory Management (sysctl tuning)'.
	- 1704:5    Use sentence case for headings: 'Network Stack Optimization'.
	- 1718:5    Use sentence case for headings: 'Storage Optimization'.
	- 1728:4    Use sentence case for headings: 'Backup and Recovery'.
	- 1730:5    Use sentence case for headings: 'Regular Backups'.
	- 1749:5    Use sentence case for headings: 'Recovery Procedure'.
	- 1767:4    Use sentence case for headings: 'Security Considerations'.

node/snapshot.mdx:
	- 11:4    Use sentence case for headings: 'Snapshot Sync'.
	- 17:4    Use sentence case for headings: 'Snapshot Providers'.

node/statesync.mdx:
	- 9:4     Use sentence case for headings: 'State Sync'.
	- 15:4    Use sentence case for headings: 'Clean Up'.
	- 42:4    Use sentence case for headings: 'Statesync script'.


Found 61 suggested changes across 6 files in 727.53ms