feat(docs): Agent Skills registry + Templates gallery - #36

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

- ai/sei-skill/index.mdx
- evm/sei-js/create-sei.mdx
- learn/sip-03-migration.mdx
- node/node-operators.mdx
- .mintlify/skills/sei-bridges/SKILL.md
- .mintlify/skills/sei-contracts/SKILL.md
- .mintlify/skills/sei-frontend/SKILL.md
- .mintlify/skills/sei-migration/SKILL.md
- .mintlify/skills/sei-nodes/SKILL.md
- .mintlify/skills/sei-payments/SKILL.md
- .mintlify/skills/sei-precompiles/SKILL.md
- .mintlify/skills/sei-security/SKILL.md
- ai/skills.mdx
- evm/templates.mdx

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.mintlify/skills/sei-bridges/SKILL.md:
	- 52:4    Use sentence case for headings: 'LayerZero V2 (OFT + messaging)'.
	- 98:4    Use sentence case for headings: 'Native USDC via Circle CCTP v2'.

.mintlify/skills/sei-contracts/SKILL.md:
	- 268:4    Use sentence case for headings: 'Account abstraction (ERC-4337)'.

.mintlify/skills/sei-frontend/SKILL.md:
	- 168:5    Use sentence case for headings: 'Sei Global Wallet (embedded, social login)'.
	- 179:1    Use sentence case for headings: 'Dual-address UX ( ***** / ******* )'.
	- 213:4    Use sentence case for headings: 'ethers v6 (non-React, scripts)'.

.mintlify/skills/sei-migration/SKILL.md:
	- 58:5     Use sentence case for headings: 'Fees: use legacy gasPrice'.
	- 94:5     Use sentence case for headings: 'SSTORE: batch in memory, write once'.
	- 242:5    Use sentence case for headings: 'CPI to interface call; SPL to ERC-20'.
	- 263:5    Use sentence case for headings: 'PDA to mapping or CREATE2'.

.mintlify/skills/sei-nodes/SKILL.md:
	- 161:4    Use sentence case for headings: 'SeiDB, RocksDB, and Giga'.

.mintlify/skills/sei-payments/SKILL.md:
	- 49:4    Use sentence case for headings: 'Send / accept USDC (viem)'.

.mintlify/skills/sei-precompiles/SKILL.md:
	- 70:4     Use sentence case for headings: 'Staking + Distribution (ethers v6)'.
	- 257:4    Use sentence case for headings: 'Address association (Addr precompile)'.
	- 275:4    Use sentence case for headings: 'Cross-VM pointers (PointerView / Pointer)'.
	- 303:4    Use sentence case for headings: 'TokenFactory: launch a native token'.

.mintlify/skills/sei-security/SKILL.md:
	- 98:4     Use sentence case for headings: 'Safe randomness — never PREVRANDAO'.
	- 141:4    Use sentence case for headings: 'Cross-VM address safety and precompile inputs'.

evm/sei-js/create-sei.mdx:
	- 14:4    Use sentence case for headings: 'Quick Start'.
	- 31:4    Use sentence case for headings: 'Interactive Setup'.
	- 57:5    Use sentence case for headings: 'CLI Options'.
	- 66:4    Use sentence case for headings: 'Default Template'.
	- 80:5    Use sentence case for headings: 'List Available Extensions'.
	- 86:5    Use sentence case for headings: 'Precompiles Extension'.

learn/sip-03-migration.mdx:
	- 40:4     Use sentence case for headings: 'IBC Asset Migration Table'.
	- 62:5     Use sentence case for headings: '1) Asset Transfer (Native ↔ EVM)'.
	- 71:5     Use sentence case for headings: '2) USDC on Sei'.
	- 96:5     Use sentence case for headings: '3) Address Association (Seistream)'.
	- 176:4    Use sentence case for headings: 'FAQ'.
	- 208:5    Use sentence case for headings: 'I hold USDC.n (USDC via Noble) — what should I do?'.

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)'.
	- 100:5     Use sentence case for headings: 'Default Configurations'.
	- 1366:4    Use sentence case for headings: 'Database Management'.
	- 1391:5    Use sentence case for headings: 'SeiDB Configuration'.
	- 1476:5    Use sentence case for headings: 'Giga Storage and Giga Executor'.
	- 1540:5    Use sentence case for headings: 'Database Maintenance'.
	- 1567:4    Use sentence case for headings: 'Service Management'.
	- 1569:5    Use sentence case for headings: 'Systemd Commands'.
	- 1588:5    Use sentence case for headings: 'Log Management'.
	- 1609:4    Use sentence case for headings: 'Update Procedures'.
	- 1611:5    Use sentence case for headings: 'Minor Updates'.
	- 1629:5    Use sentence case for headings: 'Major Updates'.
	- 1653:4    Use sentence case for headings: 'Performance Optimization'.
	- 1661:5    Use sentence case for headings: 'Memory Management (sysctl tuning)'.
	- 1675:5    Use sentence case for headings: 'Network Stack Optimization'.
	- 1689:5    Use sentence case for headings: 'Storage Optimization'.
	- 1699:4    Use sentence case for headings: 'Backup and Recovery'.
	- 1701:5    Use sentence case for headings: 'Regular Backups'.
	- 1720:5    Use sentence case for headings: 'Recovery Procedure'.
	- 1738:4    Use sentence case for headings: 'Security Considerations'.


Found 54 suggested changes across 11 files in 978.41ms